CN210595743U - Petrochemical sludge treatment system - Google Patents
Petrochemical sludge treatment system Download PDFInfo
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- CN210595743U CN210595743U CN201921112673.0U CN201921112673U CN210595743U CN 210595743 U CN210595743 U CN 210595743U CN 201921112673 U CN201921112673 U CN 201921112673U CN 210595743 U CN210595743 U CN 210595743U
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Abstract
The utility model relates to the technical field of sludge treatment, in particular to a petrochemical sludge treatment system, which comprises a sludge concentration unit, a sludge dewatering unit and a sludge drying unit, wherein the sludge concentration unit comprises a sludge thickening tank, and wet sludge at the bottom of the sludge thickening tank is discharged into the sludge dewatering unit through a sludge pipe; the sludge dewatering unit comprises a centrifugal dewatering machine, the feed end of the centrifugal dewatering machine is connected to the sludge pipe, and the slag discharge port of the centrifugal dewatering machine is connected with the sludge drying unit; the sludge drying unit comprises a composite sludge dryer, a sludge distributor, a steam heat exchanger, a circulating fan, a screw conveyor, a dry sludge collecting mechanism and a control unit for controlling the equipment. The utility model discloses degree of automation is high, area is little, the management is convenient, adopts sludge concentration, centrifugal dehydration, low temperature belt mummification combined system to handle petrochemical industry waste water sludge treatment, and the actual quality of water characteristic of laminating petrochemical industry waste water sludge treatment is worth promoting.
Description
Technical Field
The utility model relates to a sludge treatment technical field especially relates to a petrochemical sludge treatment system.
Background
The dehydration and further proper treatment of sludge generated in the industrial wastewater treatment process are important components of wastewater treatment, but for a long time, the domestic trend is to emphasize wastewater treatment and light sludge treatment. The amount of chemical and medical waste water is large, the components are complex, toxic and harmful substances are large, sludge produced in the treatment process, especially chemical sludge produced in the physical and chemical technological processes of coagulating sedimentation (air flotation) and the like, often contains toxic and harmful substances which are harmful to the environment, such as chemical plant waste water sludge for producing pesticides, often contains toxic compounds, and medical company waste water sludge for producing hormone drugs can contain teratogenic and mutagenic components, and if the treatment is not proper and the control is strict, serious influence can be inevitably produced on the environment and the human health. With the continuous progress of social material culture and mental culture, the environmental requirements of the public and government are further increased, and environmental science research has also begun to enter into the research on the influence of trace compounds on the environment. Therefore, attention is paid to and strict control of sludge treatment in the industrial wastewater treatment process, and the method plays an important role in controlling environmental pollution.
Due to the particularity of the petrochemical industry, different enterprises produce different products, and the produced sewage also contains various characteristic pollutants related to organic chemical products of the sewage, such as polycyclic aromatic hydrocarbon compounds, aromatic amine compounds, heterocyclic compounds and the like, so that the sewage not only has complex water quality, but also has a large amount of toxic substances, and the existing sludge treatment method cannot meet the requirements, and therefore, a petrochemical sludge treatment system is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects existing in the prior art and providing a petrochemical sludge treatment system.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
designing a petrochemical sludge treatment system, which comprises a sludge concentration unit, a sludge dehydration unit and a sludge drying unit, wherein wet sludge is dried through the sludge concentration unit, the sludge dehydration unit and the sludge drying unit in sequence;
the sludge concentration unit comprises a sludge concentration tank, wet sludge at the bottom of the sludge concentration tank is discharged into the sludge dehydration unit through a sludge pipe, and a sludge pump is arranged on the sludge pipe;
the sludge dewatering unit comprises a centrifugal dewatering machine, the feed end of the centrifugal dewatering machine is connected to the sludge pipe, and the slag discharge port of the centrifugal dewatering machine is connected with the sludge drying unit;
the sludge drying unit comprises a composite sludge dryer, a sludge distributing device, a steam heat exchanger, a circulating fan, a screw pump and a dry sludge collecting mechanism, and a control unit for controlling the equipment, wherein the sludge distributing device is arranged above the feeding end of the composite sludge dryer, the feeding port of the sludge distributing device is connected to the deslagging port of the centrifugal dehydrator through the screw pump, the discharging end of the composite sludge dryer is provided with the dry sludge collecting mechanism, the composite sludge dryer is connected with the steam heat exchanger through a circulating drying pipe, the circulating fan is arranged on the circulating drying pipe, the steam heat exchanger is connected with a steam pipe, and the steam heat exchanger is provided with a waste heat collecting mechanism on a bypass.
Preferably, one side of the top of the sludge concentration tank is connected with a supernatant fluid discharge pipe, and a drainage port of the centrifugal dehydrator is connected with a dehydration drainage pipe.
Preferably, the dry sludge collecting mechanism comprises a dry sludge bin and a bucket elevator, wherein the material receiving end of the bucket elevator is arranged corresponding to the dry sludge discharging end of the composite sludge dryer, and the discharging end of the bucket elevator is arranged above the dry sludge bin.
Preferably, the waste heat collecting mechanism comprises a waste heat recovery device, the waste heat recovery device is connected to a pipe section of the circulating drying pipe behind the air exhaust end of the composite sludge dryer through a waste heat pipe, exhaust air in the waste heat pipe is led out through the dehumidifying fan after heat recovery by the waste heat recovery device, the waste heat recovery device is connected with a fresh air pipe, and air in the fresh air pipe is preheated by the waste heat recovery device and then led into the circulating fan.
Preferably, the joint of the circulating drying pipe and the waste heat pipe is provided with a regulating valve for shunting.
Preferably, the waste heat recovery device is a plate heat exchanger.
Preferably, the composite sludge dryer is a composite belt dryer.
Preferably, the control unit is a PLC control system.
Preferably, the centrifugal dehydrator adopts a horizontal spiral centrifuge.
Preferably, the sludge distributing device adopts a screw type granulator.
The utility model provides a petrochemical sludge treatment system, beneficial effect lies in:
(1) the utility model discloses a complete sets can realize the continuous drying to mud, and degree of automation is high, area is little, the management is convenient.
(2) The utility model discloses a petrochemical waste water sludge treatment is handled to sludge thickening, centrifugal dehydration, low temperature belt mummification combined system, and the actual quality of water characteristic of petrochemical industry waste water sludge treatment of laminating has very high novelty and suitability.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a flow chart of the sludge drying unit of the present invention.
Labeled as: the system comprises a sludge concentration tank 1, a sludge pump 2, a centrifugal dehydrator 3, a sludge distribution device 4, a composite sludge dryer 5, a steam heat exchanger 6, a circulating fan 7, a waste heat recovery device 8, a moisture exhaust fan 9, a dry sludge bin 10, a sludge pipe 11, a circulating drying pipe 12, an adjusting valve 13, a supernatant discharge pipe 14, a dehydration liquid discharge pipe 15, a waste heat pipe 16, a fresh air pipe 17, a steam pipe 18, a screw pump 19 and a bucket elevator 20.
Detailed Description
The present invention will be further described with reference to the following specific examples. These examples are provided only for illustrating the present invention and are not intended to limit the scope of the present invention. In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The structural features of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1-2, a petrochemical sludge treatment system comprises a sludge concentration unit, a sludge dehydration unit and a sludge drying unit, wherein wet sludge is dried sequentially through the sludge concentration unit, the sludge dehydration unit and the sludge drying unit;
the sludge concentration unit comprises a sludge concentration tank 1, wet sludge at the bottom of the sludge concentration tank 1 is discharged into the sludge dehydration unit through a sludge pipe 11, and a sludge pump 2 is arranged on the sludge pipe 11;
the sludge dewatering unit comprises a centrifugal dewatering machine 3, the feed end of the centrifugal dewatering machine 3 is connected to a sludge pipe 11, and a slag discharge port of the centrifugal dewatering machine 3 is connected with the sludge drying unit;
the sludge drying unit comprises a composite sludge dryer 5, a sludge distributing device 4, a steam heat exchanger 6, a circulating fan 7, a screw pump 19 and a dry sludge collecting mechanism, and a control unit for controlling the above equipment, the sludge distributing device 4 is arranged above the feeding end of the composite sludge dryer 5, a feeding port of the sludge distributing device 4 is connected to a slag discharge port of the centrifugal dehydrator 3 through the screw pump 19, a discharging end of the composite sludge dryer 5 is provided with the dry sludge collecting mechanism, the composite sludge dryer 5 is connected with the steam heat exchanger 6 through a circulating drying pipe 12, the circulating drying pipe 12 is provided with the circulating fan 7, the steam heat exchanger 6 is connected with a steam pipe 18, and a bypass of the steam heat exchanger 6 is provided with a waste heat collecting mechanism.
The utility model discloses a petrochemical sludge treatment system adopts complete sets can realize the continuous drying to mud, and degree of automation is high, area is little, the management is convenient, adopts sludge concentration, centrifugal dehydration, low temperature belt mummification combined system to handle petrochemical waste water sludge treatment, and the actual quality of water characteristic of laminating petrochemical industry waste water sludge treatment has very high novelty and suitability.
Specifically, when the device is used, sludge discharged from an air floatation device, a secondary sedimentation tank and a high-density sedimentation tank in petrochemical sewage treatment is collected and discharged into a sludge concentration tank 1 for sludge concentration, the sludge concentration is an effective method for reducing the water content of the sludge and reducing the volume of the sludge, the sludge concentration mainly reduces interstitial water of the sludge, the concentrated sludge is approximately pasty and still keeps the fluidity, the mechanical concentration method is adopted, the water content of the sludge can be reduced to 96% -98%, then the concentrated sludge is centrifugally dewatered by a centrifugal dehydrator 3 to reduce the water content of the sludge to about 80%, then a composite low-temperature belt type drying is carried out by a composite sludge dryer 5 taking steam as a heat source to further reduce the water content of the sludge to 20%, and a sludge cake is transported and treated.
Referring to fig. 1, a supernatant discharge pipe 14 is connected to one side of the top of the sludge concentration tank 1, and a dewatering discharge pipe 15 is connected to a discharge port of the centrifugal dehydrator 3.
And a supernatant fluid discharge pipe 14 and a dewatering drain pipe 15 are arranged, and supernatant fluid of the sludge concentration unit and sludge dewatering supernatant fluid of the sludge dewatering unit flow back to the sewage treatment unit through the supernatant fluid discharge pipe 14 and the dewatering drain pipe 15 to be subjected to centralized recovery treatment.
Referring to fig. 1, further, the dry sludge collecting mechanism includes a dry sludge bin 10 and a bucket elevator 20, a receiving end of the bucket elevator 20 is disposed corresponding to a dry sludge discharging end of the composite sludge dryer 5, and a discharging end of the bucket elevator 20 is disposed above the dry sludge bin 10.
And a dry sludge collecting mechanism is arranged for collecting and transporting the dried sludge cakes outside in a centralized manner.
Referring to fig. 1, further, the waste heat collecting mechanism includes a waste heat recovering device 8, the waste heat recovering device 8 is connected to a pipe section of the circulating drying pipe 12 at the rear of the air exhaust end of the composite sludge drying machine 5 through a waste heat pipe 16, exhaust air in the waste heat pipe 16 is led out through a dehumidifying fan 9 after being subjected to heat recovery through the waste heat recovering device 8, a fresh air pipe 17 is connected to the waste heat recovering device 8, and air in the fresh air pipe 17 is preheated through the waste heat recovering device 8 and then led into the circulating fan 7.
Set up waste heat recovery device 8, waste heat recovery device 8 can carry out the preheating to the new trend, carries out recycle to the waste heat, has reduced thermal loss, the energy saving.
Referring to fig. 1, further, a regulating valve 13 for shunting is arranged at the joint of the circulation drying pipe 12 and the waste heat pipe 16.
The adjusting valve 13 is arranged, the adjusting valve 13 can divide the exhaust air of the composite sludge dryer 5 into two paths, one path of the exhaust air circularly enters the steam heat exchanger 6, and the other path of the exhaust air enters the waste heat recovery device 8 to carry out waste heat treatment on fresh air.
Further, the waste heat recovery device 8 is a plate heat exchanger.
Further, the composite sludge dryer 5 is a composite belt dryer.
Furthermore, the control unit is a PLC control system.
Further, the centrifugal dehydrator 3 employs a horizontal screw centrifuge.
Further, the sludge distributing device 4 adopts a screw type granulator.
Sludge drying treatment process: the first step is sludge concentration, sludge discharged from an air floatation device, a secondary sedimentation tank and a high-density sedimentation tank in the petrochemical sewage treatment is collected and discharged into a sludge concentration tank 1 for concentration, and the water content of the sludge can be reduced to 96-98%.
And secondly, centrifugal dehydration is carried out, a rotary drum and a screw of the centrifugal dehydrator 3 rotate in the same direction and at high speed at a certain differential speed, materials are continuously introduced into an inner cylinder of the material conveying screw through a feeding pipe, enter the rotary drum after acceleration, heavy solid-phase substances are deposited on the wall of the rotary drum to form a sediment layer under the action of a centrifugal force field, the deposited solid-phase substances are continuously pushed to the conical end of the rotary drum by the material conveying screw and are discharged out of the machine through a slag discharge port, light liquid-phase substances form an inner-layer liquid ring, the heavy liquid-phase substances continuously overflow the rotary drum through an overflow port at the large end of the rotary drum and are discharged out of the machine through a liquid discharge port, the centrifugal dehydrator 3 can continuously feed, separate, wash and unload materials under the full-speed.
Thirdly, a low-temperature belt type drying all-in-one machine is carried out, wet sludge with the water content of about 80 percent is sent into a screw rod type granulator by a screw rod 19, mud strips are evenly paved on a mesh belt of a composite sludge dryer 5 after being granulated by the screw rod type granulator, materials falling on the mesh belt move forwards at a constant speed under the driving of a transmission motor, heated hot air is blown into a dryer unit box body from bottom to top and evenly penetrates through a material layer from top to bottom, the temperature of the hot air is rapidly reduced after the hot air is contacted with the wet materials, the wet materials rapidly carry out heat and mass transfer exchange after absorbing heat in the hot air, the moisture in the wet materials is rapidly transferred to the outside and taken away by the hot air, the taken away wet air is discharged by a moisture exhaust fan 9 and sent into a plant tail gas treatment device for purification treatment, the wet air is discharged to the outside after reaching the discharge, the dried material is discharged out of the machine from the discharge end and conveyed into a sludge bin 10.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A petrochemical sludge treatment system comprises a sludge concentration unit, a sludge dehydration unit and a sludge drying unit, and is characterized in that wet sludge is dried sequentially through the sludge concentration unit, the sludge dehydration unit and the sludge drying unit;
the sludge concentration unit comprises a sludge concentration tank (1), wet sludge at the bottom of the sludge concentration tank (1) is discharged into the sludge dehydration unit through a sludge pipe (11), and a sludge pump (2) is arranged on the sludge pipe (11);
the sludge dewatering unit comprises a centrifugal dewatering machine (3), the feed end of the centrifugal dewatering machine (3) is connected to the sludge pipe (11), and the slag discharge port of the centrifugal dewatering machine (3) is connected with the sludge drying unit;
the sludge drying unit comprises a composite sludge dryer (5), a sludge distributing device (4), a steam heat exchanger (6), a circulating fan (7), a screw pump (19) and a dry sludge collecting mechanism, and a control unit for controlling the above equipment, the sludge distributing device (4) is arranged above the feed end of the composite sludge dryer (5), the feed inlet of the sludge distributing device (4) is connected with the slag discharge port of the centrifugal dehydrator (3) through a screw pump (19), the discharge end of the composite sludge dryer (5) is provided with a dry sludge collecting mechanism, the composite sludge dryer (5) is connected with a steam heat exchanger (6) through a circulating drying pipe (12), the circulating drying pipe (12) is provided with a circulating fan (7), the steam heat exchanger (6) is connected with a steam pipe (18), and a bypass of the steam heat exchanger (6) is provided with a waste heat collecting mechanism.
2. The petrochemical sludge treatment system according to claim 1, wherein one side of the top of the sludge concentration tank (1) is connected with a supernatant fluid discharge pipe (14), and a drainage port of the centrifugal dehydrator (3) is connected with a dehydration drainage pipe (15).
3. The petrochemical sludge treatment system according to claim 1, wherein the dry sludge collection mechanism comprises a dry sludge bin (10) and a bucket elevator (20), the receiving end of the bucket elevator (20) is arranged corresponding to the dry sludge discharging end of the composite sludge dryer (5), and the discharging end of the bucket elevator (20) is arranged above the dry sludge bin (10).
4. The petrochemical sludge treatment system according to claim 1, wherein the waste heat collecting mechanism comprises a waste heat recovery device (8), the waste heat recovery device (8) is connected to a pipe section of the circulating drying pipe (12) behind the air exhaust end of the composite sludge dryer (5) through a waste heat pipe (16), exhaust air in the waste heat pipe (16) is led out through a dehumidifying fan (9) after being subjected to heat recovery through the waste heat recovery device (8), the waste heat recovery device (8) is connected with a fresh air pipe (17), and air in the fresh air pipe (17) is preheated through the waste heat recovery device (8) and then led into the circulating fan (7).
5. The petrochemical sludge treatment system according to claim 4, wherein a regulating valve (13) for shunting is arranged at the joint of the circulating drying pipe (12) and the waste heat pipe (16).
6. Petrochemical sludge treatment system according to claim 4, wherein the waste heat recovery device (8) is a plate heat exchanger.
7. Petrochemical sludge treatment system according to claim 1, wherein the composite sludge dryer (5) is a composite belt dryer.
8. The petrochemical sludge treatment system according to claim 1, wherein the control unit is a PLC control system.
9. The petrochemical sludge treatment system according to claim 1, wherein the centrifugal dehydrator (3) employs a horizontal screw centrifuge.
10. The petrochemical sludge treatment system according to claim 1, wherein the sludge distribution device (4) adopts a screw-type granulator.
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CN110240380A (en) * | 2019-07-16 | 2019-09-17 | 科盛环保科技股份有限公司 | A kind of petrochemical industry sludge treating system |
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CN110240380A (en) * | 2019-07-16 | 2019-09-17 | 科盛环保科技股份有限公司 | A kind of petrochemical industry sludge treating system |
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