CN115057587B - Waste water treatment system and waste water treatment method for water drill - Google Patents
Waste water treatment system and waste water treatment method for water drill Download PDFInfo
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- CN115057587B CN115057587B CN202210755820.6A CN202210755820A CN115057587B CN 115057587 B CN115057587 B CN 115057587B CN 202210755820 A CN202210755820 A CN 202210755820A CN 115057587 B CN115057587 B CN 115057587B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 168
- 238000004065 wastewater treatment Methods 0.000 title claims abstract description 36
- 239000010802 sludge Substances 0.000 claims abstract description 228
- 239000002351 wastewater Substances 0.000 claims abstract description 127
- 238000004062 sedimentation Methods 0.000 claims abstract description 98
- 238000005498 polishing Methods 0.000 claims abstract description 59
- 239000000706 filtrate Substances 0.000 claims abstract description 41
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 33
- 238000003825 pressing Methods 0.000 claims description 16
- 238000004064 recycling Methods 0.000 claims description 16
- 238000003860 storage Methods 0.000 claims description 16
- 239000008394 flocculating agent Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 12
- 238000007517 polishing process Methods 0.000 claims description 8
- 239000002910 solid waste Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 description 7
- 238000001179 sorption measurement Methods 0.000 description 7
- 238000005189 flocculation Methods 0.000 description 6
- 239000003344 environmental pollutant Substances 0.000 description 5
- 230000016615 flocculation Effects 0.000 description 5
- 231100000719 pollutant Toxicity 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 239000000377 silicon dioxide Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000012459 cleaning agent Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Mechanical Engineering (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a wastewater treatment system and a wastewater treatment method for a water drill, and belongs to the technical field of water drills. The device comprises a biochemical treatment device, a grinding and polishing wastewater pretreatment device, a round grinding and polishing wastewater pretreatment device and a neutralization reaction tank, wherein the grinding and polishing wastewater pretreatment device and the round grinding and polishing wastewater pretreatment device comprise a collecting ditch, a sedimentation tank, a clean water tank, a sludge collecting tank, a filter press, a sludge ditch and a walkable sludge pump; the collecting ditch is connected with the sedimentation tank, the sedimentation tank overflows to the clean water tank, clear water in the clean water tank is recycled, the sludge ditch is connected with the sludge collecting tank, the sedimentation tank and the sludge collecting tank are both connected with the filter press, the filtrate outlet of the filter press of the grinding and polishing wastewater pretreatment device is connected with the neutralization reaction tank, the filtrate outlet of the filter press of the round grinding wastewater pretreatment device is connected with the neutralization reaction tank and the clean water tank, and the neutralization reaction tank is connected with the biochemical treatment device.
Description
Technical Field
The invention belongs to the technical field of water drills, and particularly relates to a wastewater treatment system and a wastewater treatment method of a water drill.
Background
The water drill is an accessory with wide application, and is mainly applied to the fields of ornaments, artware, clothes, shoes and the like. The water drill manufacturing process mainly comprises a front step and a rear step, wherein the front step of the first part is the shape manufacture of the water drill (the two ends are semi-finished products with tips), the water drill manufacturing process is mainly realized by means of automatic control of equipment (a full-automatic grinding and polishing machine), the rear step of the second part is the subsequent processing of the semi-finished products, and the process mainly comprises the procedures of plastic suction, circular grinding and the like. The polishing process can generate a large amount of wastewater, and the wastewater contains a cleaning agent for cleaning the bead blank, components of a water drill (the main component is silicon dioxide and contains a small amount of other components), components of a polishing roller, lubricating oil and the like; similarly, the circular grinding process generates a large amount of wastewater, and the wastewater contains a cleaning agent for cleaning the diamond (for cleaning rosin, polishing residues, and the like), a component of the diamond, a component of the circular grinding disc, a component of the plastic suction disc (the plastic suction disc is ground together during circular grinding), glue, lubricating oil, and the like. In the prior art, grinding and polishing wastewater (weak alkaline) and circular grinding wastewater (weak alkaline) are mixed and then sent to a biochemical treatment device for treatment, and after meeting the standard, sent to a municipal wastewater treatment plant for treatment. Applicant found that the water drilling wastewater is significantly different from conventional industrial wastewater: firstly, silicon dioxide is the main component, and the possibility of recycling is provided; secondly, the solid content is high, and the direct feeding into a biochemical treatment device is not suitable; thirdly, PVC is the main component of the plastic sucking disc, and recycling is possible; fourth, the wastewater amount is large, and the treatment capacity of the biochemical treatment device is required to be large.
Disclosure of Invention
In order to solve the problems, the applicant finds that solid matters in polishing and round grinding wastewater have strong adsorption capacity and are very easy to be settled by a flocculating agent, clear water (pH is about 7.5) after the wastewater is settled by the flocculating agent can be recycled, main pollutants are adsorbed in sludge, filtrate (pH value is higher and can reach 10) after sludge filter pressing is neutralized and then is sent to a biochemical treatment device, the amount of the filtrate is small, and the treatment capacity requirement on the biochemical treatment device is low. The circular grinding wastewater contains a large amount of PVC solid matters, the sedimentation speed (the flocculation speed of PVC is faster) and the adsorption capacity to pollutants are changed (impurities after adsorption are not easy to enter filtrate after filter pressing), part of PVC is recyclable, and filter pressing meeting the requirements is recyclable. The technical scheme is as follows:
In one aspect, the embodiment of the invention provides a waste water treatment system of a water drill, which comprises a biochemical treatment device, a polishing waste water pretreatment device, a round polishing waste water pretreatment device and a neutralization reaction tank 8, wherein the polishing waste water pretreatment device and the round polishing waste water pretreatment device respectively comprise a collecting ditch, a sedimentation tank, a clean water tank, a sludge collecting tank, a filter press, a sludge ditch parallel to the collecting ditch and a movable sludge pump capable of reciprocating in the collecting ditch and delivering sludge into the sludge ditch, the water inlet end of the collecting ditch of the polishing waste water pretreatment device is used for collecting polishing waste water, and the water inlet end of the collecting ditch of the round polishing waste water pretreatment device is used for collecting round polishing waste water; the water outlet end of the collecting ditch is connected with a corresponding sedimentation tank, the sedimentation tank overflows to a corresponding clean water tank, clear liquid in the clean water tank is recycled, the water outlet end of the sludge ditch is connected with a corresponding sludge collecting tank, the bottom of the sedimentation tank and the sludge collecting tank are connected with a corresponding filter press through pipelines with filter pressing pumps and valve groups, a filtrate outlet of the filter press of the grinding and polishing wastewater pretreatment device is connected with a neutralization reaction tank 8 through a pipeline, a filtrate outlet of the filter press of the round grinding wastewater pretreatment device is connected with the neutralization reaction tank 8 and the corresponding clean water tank through a pipeline, and the neutralization reaction tank 8 is connected with a biochemical treatment device.
Further, the wastewater treatment system of the water drill in the embodiment of the invention further comprises a flocculating agent adding device 9, wherein the flocculating agent adding device 9 is connected with the water inlet ends of the two collecting ditches through a pipeline with a control valve.
Wherein, the collecting trench in the embodiment of the invention is arranged along the front and back directions; the movable sludge pump comprises a traveling vehicle 71 capable of moving in a collecting ditch, a plurality of traveling wheels 72 at the bottom of the traveling vehicle 71, two steel wire rope traction structures 73 at the front end and the rear end of the collecting ditch, a vertical dredging pump 74 arranged vertically on the traveling vehicle 71, two guide plates 75 at the left side and the right side of the traveling vehicle 71 and a sludge discharging pipe 76 at the outlet of the vertical dredging pump 74, wherein the guide plates 75 are arranged in the front-back direction and positioned at the adjacent inner sides of the corresponding side ditch walls, the traveling wheels 72 are arranged in the left-right direction, the upper side of the traveling vehicle 71 is of a cone-shaped structure with a large upper part and a small lower part, a pump inlet 77 at the bottom of the vertical dredging pump 74 is fixed at the bottom of the cone-shaped structure and penetrates the traveling vehicle 71 downwards, the hopper walls at the left side and the right side of the cone-shaped structure are provided with V-shaped notches 78 which are opened towards the corresponding side ditch walls, and the steel wire ropes of the two steel wire rope traction structures 73 at the front and the rear ends are respectively connected with the front side and the rear side of the traveling vehicle 71 and are respectively wound and unwound; the sludge discharge pipe 76 is positioned above the corresponding collection ditch and the sludge ditch, and the other end of the sludge discharge pipe is positioned right above the corresponding sludge ditch.
Specifically, in the embodiment of the present invention, the number of the traveling wheels 72 is four, the four traveling wheels 72 are arranged in a rectangular shape, two traveling wheels 72 are arranged in parallel on the left and right sides of the traveling vehicle 71, a fixing plate 79 is arranged between the V-shaped notch 78 and the guide plate 75 on the same side along the left and right directions, and the traveling wheels 72 are arranged on the lower sides of the corresponding fixing plates 79; both front and rear ends of the guide plate 75 are outwardly extended and inwardly bent with respect to the corresponding sides of the traveling carriage 71.
Specifically, the traveling vehicle 71 in the embodiment of the invention includes a front wall, a rear wall, a left wall and a right wall, the front wall is disposed obliquely downward from front to rear, the rear wall is disposed obliquely downward from rear to front, the left wall is disposed obliquely downward from left to right, the right wall is disposed obliquely downward from right to left, the front wall, the rear wall, the left wall and the right wall enclose a cone-shaped structure, the bottom of the front wall and the bottom of the rear wall intersect and the middle of the intersecting line is provided with a pump inlet 77, the left wall and the right wall are both provided with V-shaped notches 78, and the V-shaped notches 78 are disposed in the left-right direction and the tips of the V-shaped notches are opposite to the pump inlet 77.
Preferably, the grating 10 is provided in the collecting channel of the embodiment of the present invention between the water inlet end and the wire rope pulling structure 73 at the corresponding side.
Preferably, the polishing wastewater pretreatment device in the embodiment of the invention further comprises a pre-sedimentation groove 18; the water inlet end of the pre-settling ditch 18 is used for collecting polishing wastewater, the water outlet end of the pre-settling ditch is communicated with the water inlet end of the corresponding collecting ditch, the pre-settling ditch and the corresponding collecting ditch share a ditch wall, and the pre-settling ditch and the corresponding sludge ditch are respectively positioned at two sides of the corresponding collecting ditch; the collecting grooves are arranged side by side with the corresponding sludge grooves and share one groove wall, and the sludge grooves of the grinding and polishing wastewater pretreatment device and the collecting grooves of the round grinding wastewater pretreatment device are arranged side by side and share one groove wall.
Wherein, the grinding and polishing wastewater pretreatment device in the embodiment of the invention comprises a first collecting ditch 11, a first sedimentation tank 12, a first clean water tank 13, a first sludge collecting tank 14, a first filter press 15, a first sludge ditch 16 parallel to the first collecting ditch 11 and a first movable sludge pump 17 capable of reciprocating in the first collecting ditch 11 and sending sludge into the first sludge ditch 16, wherein the water inlet end of the first collecting ditch 11 is used for collecting grinding and polishing wastewater, the water outlet end of the first collecting ditch 11 is connected with the first sedimentation tank 12, the first sedimentation tank 12 overflows to the first clean water tank 13, the liquid of the first clean water tank 13 is sent to a grinding and polishing process for recycling, the water outlet end of the first sludge ditch 16 is connected with the first sludge collecting tank 14, the bottom of the first sedimentation tank 12 and the first sludge collecting tank 14 are both connected with the first filter press 15 through pipelines with filter pumps and valve sets, and the filtrate outlet of the first filter press 15 is connected with the neutralization reaction tank 8 through pipelines; the round mill wastewater pretreatment device comprises a second collecting ditch 21, a second sedimentation tank 22, a second clean water tank 23, a second sludge collecting tank 24, a second filter press 25, a second sludge ditch 26 parallel to the second collecting ditch 21 and a second walkable sludge pump 27 capable of reciprocating in the second collecting ditch 21 and sending sludge into the second sludge ditch 26, wherein the water inlet end of the second collecting ditch 21 is used for collecting round mill wastewater, the water outlet end of the second collecting ditch is connected with the second sedimentation tank 22, the second sedimentation tank 22 overflows to the second clean water tank 23, the liquid of the second clean water tank 23 is sent to a round mill process for recycling, the water outlet end of the second sludge ditch 26 is connected with the second sludge collecting tank 24, the bottom of the second sedimentation tank 22 and the second sludge collecting tank 24 are connected with the second filter press 25 through pipelines with filter pumps and valve groups, and the filtrate outlet of the second filter press 25 is connected with the neutralization reaction tank 8 and the second clean water tank 23 through pipelines and valve groups.
In another aspect, an embodiment of the present invention further provides a wastewater treatment method, including:
Pretreatment of polishing wastewater, as follows:
S101: the first collecting ditch 11 collects polishing wastewater and adds flocculant;
s102: the sludge at the bottom of the first collecting ditch 11 is sent to the first sludge ditch 16 by the first movable sludge pump 17;
S103: the sludge in the first sludge ditch 16 is sent to the first sludge collecting tank 14 for storage;
S104: the wastewater in the first collecting ditch 11 is sent to a first sedimentation tank 12 for sedimentation;
s105: the clear water of the first sedimentation tank 12 is sent to a first clear water tank 13 for storage;
s106: the sludge at the bottom of the first settling tank 12 is intermittently sent to the first filter press 15;
s107: the sludge in the first sludge collection tank 14 is sent to a first filter press 15;
S108: the filtrate of the first filter press 15 is sent to a neutralization reaction tank 8, and filter residues are sent out as solid waste;
s109: the first clean water tank 13 is filled with clean water or not filled with clean water and sent to a polishing process for reuse;
the round mill wastewater pretreatment is as follows:
s201: the second collecting ditch 21 collects the circular grinding wastewater and adds a flocculating agent;
S202: the sludge at the bottom of the second collecting ditch 21 is sent to the second sludge ditch 26 by the second movable sludge pump 27;
s203: the sludge in the second sludge ditch 26 is sent to the second sludge collection tank 24 for storage;
S204: the wastewater in the second collecting ditch 21 is sent to a second sedimentation tank 22 for sedimentation;
S205: the clean water of the second sedimentation tank 22 is sent to a second clean water tank 23 for storage;
S206: the sludge at the bottom of the second settling tank 22 is intermittently sent to a second filter press 25;
S207: the sludge of the second sludge collection tank 24 is sent to a second filter press 25;
S208: the filter residues obtained by the filter pressing of the sludge in the second sludge ditch 26 through the second filter press 25 are used for recycling PVC, and the filter residues obtained by the filter pressing of the sludge in the second sedimentation tank 22 through the second filter press 25 are sent out as solid waste; detecting the pH value of the filtrate, if the pH value is less than 7.8, sending the filtrate to a second clean water tank 23, and if the pH value is more than or equal to 7.8, sending the filtrate to a neutralization reaction tank 8;
S209: the second clean water tank 23 is filled with clean water or not filled with clean water and sent to a circular grinding process for reuse;
Alkaline wastewater pretreatment is as follows:
s301: adding acid into the neutralization reaction tank 8 to adjust the pH value of the wastewater to 6.8-7.5;
s302: sending the neutralized wastewater to a biochemical treatment device for biochemical treatment;
Wherein in steps S101 and S201, the flocculant is polyaluminum chloride; in step S102, the first movable sludge pump 17 intermittently moves back and forth; in step S202, the second movable sludge pump 27 intermittently moves back and forth.
Wherein, in the step S101, the dosage of the flocculant is 150-250g/m 3 of wastewater; in step S201, the flocculant is used in an amount of 70-120g/m 3 of wastewater.
The technical scheme provided by the embodiment of the invention has the beneficial effects that: the embodiment of the invention provides a waste water treatment system and a waste water treatment method of a water drill, and the applicant finds that solid matters in grinding, polishing and circular grinding waste water have strong adsorption capacity and are very easy to be settled by a flocculating agent, clear water (pH is about 7.5) after the waste water is settled by the flocculating agent can be recycled, main pollutants are adsorbed in sludge, filtrate (pH value is higher and can reach 10) after the sludge is subjected to filter pressing is neutralized and then sent to a biochemical treatment device, the amount of the filtrate is small, and the requirement on the treatment capacity of the biochemical treatment device is low. In the prior art, the filter pressing filtrate is generally clear liquid, and the water quality is better, and in the patent, the filter pressing filtrate is polluted liquid instead and cannot be recycled because of the adsorption capacity of solid matters. The circular grinding wastewater contains a large amount of PVC solid matters, the sedimentation speed (the flocculation speed of PVC is faster) and the adsorption capacity to pollutants are changed (impurities after adsorption are not easy to enter filtrate after filter pressing), part of PVC is recyclable, and filter pressing filtrate meeting the requirements is recyclable. In addition, the invention adopts the combination of the sludge ditch, the movable sludge pump and the collecting ditch, can rapidly reduce the solid content of the wastewater (simultaneously recycle PVC and realize sedimentation while conveying), reduces the burden of the sedimentation process, and improves the wastewater treatment speed so as to ensure the normal operation of the water drilling processing. The sludge at the bottom of the collecting ditch can be sucked out by the special structure of the walking sludge pump. The cost of wastewater treatment is low.
Drawings
FIG. 1 is a schematic block diagram of a wastewater treatment system for a water drill provided by an embodiment of the present invention;
FIG. 2 is a schematic diagram of a wastewater treatment system of a water drill according to an embodiment of the present invention;
FIG. 3 is a schematic view of a combination of a traveling vehicle and a vertical dredging pump;
Fig. 4 is a schematic view of the structure of the roof of the walker.
In the figure: the system comprises a first collecting ditch, a first sedimentation tank, a first clean water tank, a first sludge collecting tank, a first filter press, a first sludge ditch, a first movable sludge pump and a pre-sedimentation ditch, wherein the first collecting ditch, the first sedimentation tank, the first clean water tank, the first sludge collecting tank, the first filter press, the first sludge ditch, the first movable sludge pump and the pre-sedimentation ditch are respectively arranged in the first collecting ditch, the first sedimentation tank, the first sludge collecting tank, the first filter press, the first sludge ditch, the first movable sludge pump and the pre-sedimentation ditch;
A second collecting ditch 21, a second sedimentation tank 22, a second clean water tank 23, a second sludge collecting tank 24, a second filter press 25, a second sludge ditch 26 and a second walkable sludge pump 27;
71 traveling vehicles, 72 traveling wheels, 73 steel wire rope traction structures, 74 vertical dredging pumps, 75 guide plates, 76 sludge discharge pipes, 77 pump inlets, 78V-shaped notches and 79 fixing plates;
8 neutralization reaction tanks, 9 flocculant adding devices and 10 grids.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present invention more apparent.
Example 1
Referring to fig. 1 to 2, example 1 provides a wastewater treatment system of a water drill, which comprises a biochemical treatment device, a polishing wastewater pretreatment device, a round polishing wastewater pretreatment device, a neutralization reaction tank 8 (acid is added), and the like. The circular grinding wastewater pretreatment device comprises a collecting ditch, a sedimentation tank, a clean water tank, a sludge collecting tank, a filter press, a sludge ditch parallel to the collecting ditch, a walking sludge pump capable of reciprocating in the collecting ditch and conveying sludge into the sludge ditch, and the like, wherein the water inlet end of the collecting ditch of the circular grinding wastewater pretreatment device is used for collecting grinding wastewater, and the water inlet end of the collecting ditch of the circular grinding wastewater pretreatment device is used for collecting circular grinding wastewater. The water outlet end of the collecting ditch is connected with a corresponding sedimentation tank, clear water of the sedimentation tank overflows to a corresponding clear water tank, and clear water of the clear water tank is recycled. The water outlet end of the sludge ditch (with the water inlet end closed) is connected with a corresponding sludge collecting tank, and the bottom of the sedimentation tank (periodically or when the sludge reaches a certain amount, the sludge is output) and the sludge collecting tank are connected with a corresponding filter press through a pipeline with a filter press pump and a valve group. The filtrate outlet of the filter press of the grinding and polishing wastewater pretreatment device (the pH value of the wastewater is about 10) is connected with the neutralization reaction tank 8 through a pipeline, and the filtrate outlet of the filter press of the round grinding wastewater pretreatment device (the water quality of the wastewater is better than that of the filtrate of the grinding and polishing wastewater pretreatment device, the pH value is changed to 7.5-9, and the filtrate which meets the requirements is recycled) is connected with the neutralization reaction tank 8 and the corresponding clean water tank through a pipeline. The neutralization reaction tank 8 is connected with a biochemical treatment device, and wastewater treated by the biochemical treatment device is sent to a municipal wastewater treatment plant. Wherein the settling pond in this embodiment comprises one or more settling ponds in series.
Further, referring to fig. 1-2, the wastewater treatment system of the water drill in the embodiment of the invention further comprises a flocculant adding device 9, and the flocculant adding device 9 is connected with the water inlet ends of the two collecting ditches through a pipeline with a control valve.
Wherein, for convenience of description, the collection grooves are arranged along the front and back directions; of course, the collecting channels may be arranged in other directions. Referring to fig. 2 to 4, the walkable sludge pump includes a walking vehicle 71 (rectangular structure arranged in the front and rear directions) capable of moving in the collection ditch, a plurality of walking wheels 72 at the bottom of the walking vehicle 71, two wire rope traction structures 73 (the output wires are arranged in the front and rear directions) at the front and rear ends of the collection ditch (the water inlet end and the water outlet end of the collection ditch), a vertical dredging pump 74 (the motor is located above the liquid surface) on the walking vehicle 71 and arranged vertically, two guide plates 75 (for guiding the walking vehicle 71 in the front and rear directions) on the left and right sides of the walking vehicle 71, a sludge discharge pipe 76 on the outlet of the vertical dredging pump 74, and the like. Wherein the guide plate 75 is arranged in the front-rear direction, which is located adjacent to the inner side of the groove wall of the corresponding side, which may be specifically a vertically arranged rectangular plate. The road wheels 72 are disposed in the left-right direction. The upper side of the traveling car 71 is a conical bucket-shaped structure with a large upper part and a small lower part so as to collect more sludge, a pump inlet 77 (the bottom and the periphery can suck the sludge) at the bottom of the vertical dredging pump 74 is fixed at the bottom of the conical bucket-shaped structure and downwards penetrates through the traveling car 71, and V-shaped notches 78 (which are convenient for collecting the sludge and arranging the traveling wheels 72) opening towards corresponding side ditch walls are arranged on the bucket walls at the left side and the right side of the conical bucket-shaped structure. The wire ropes of the two wire rope traction structures 73 at the front and rear ends are respectively connected with the front and rear sides of the traveling carriage 71 and respectively wind and unwind to make the traveling carriage 71 reciprocate in the front and rear directions. The sludge discharge pipe 76 is located above the corresponding collection ditch and sludge ditch, and the other end thereof is located right above the corresponding sludge ditch, and is disposed in the left-right direction.
Specifically, referring to fig. 3-4, in the embodiment of the present invention, the number of the traveling wheels 72 is four, the four traveling wheels 72 are arranged in a rectangular shape, two traveling wheels 72 are arranged in parallel on the left and right sides of the traveling vehicle 71, a fixing plate 79 (four traveling wheels are arranged in a rectangular shape) is arranged between the v-shaped notch 78 and the guide plate 75 on the same side along the left and right directions, and the traveling wheels 72 are arranged on the lower sides of the corresponding fixing plates 79. Both front and rear ends of the guide plate 75 are bent inward to extend outward with respect to the corresponding sides of the traveling carriage 71.
Specifically, referring to fig. 3-4, the walking vehicle 71 in the embodiment of the present invention includes a front bucket wall on the front side, a rear bucket wall on the rear side, a left bucket wall on the left side, and a right bucket wall on the right side, where the front bucket wall is disposed obliquely downward from front to back, the rear bucket wall is disposed obliquely downward from back to front, the left bucket wall is disposed obliquely downward from left to right, the right bucket wall is disposed obliquely downward from right to left, and the front bucket wall, the rear bucket wall, the left bucket wall, and the right bucket wall enclose a cone-shaped structure. The bottom of the front bucket wall and the bottom of the rear bucket wall are intersected, a pump inlet 77 is arranged in the middle of an intersection line of the front bucket wall and the rear bucket wall, and V-shaped notches 78 are formed in the left bucket wall and the right bucket wall. The V-shaped notch 78 is disposed in a side-to-side direction with its tip facing the pump inlet 77 and its outside open.
Preferably, referring to fig. 1, a grating 10 (mainly used to avoid the passage of floats) is provided in the collection gutter between the water inlet end and the wire rope pulling structure 73 on the corresponding side in the embodiment of the present invention.
Preferably, referring to fig. 1, the polishing wastewater pretreatment apparatus in the embodiment of the present invention further includes a pre-sedimentation groove 18. The sedimentation capacity of the polishing wastewater is weaker than that of the circular polishing wastewater, and the self-flocculation is needed, and then the flocculant is added for flocculation. The water inlet end of the pre-sedimentation ditch 18 is used for collecting polishing wastewater, the water outlet end of the pre-sedimentation ditch is communicated with the water inlet end of the corresponding collecting ditch (the first collecting ditch 11), the pre-sedimentation ditch and the corresponding collecting ditch (the first collecting ditch 11) share a ditch wall, and the pre-sedimentation ditch and the corresponding sludge ditch (the first sludge ditch 16) are respectively positioned at two sides of the corresponding collecting ditch (the first collecting ditch 11). The collecting grooves are arranged side by side with the corresponding sludge grooves and share one groove wall, and the sludge grooves (the first sludge grooves 16) of the grinding and polishing wastewater pretreatment device and the collecting grooves (the second collecting grooves 21) of the round grinding wastewater pretreatment device are arranged side by side and share one groove wall.
Wherein, the polishing wastewater pretreatment device in the embodiment of the invention comprises a first collecting ditch 11, a first sedimentation tank 12, a first clean water tank 13, a first sludge collecting tank 14, a first filter press 15, a first sludge ditch 16 parallel to the first collecting ditch 11, a first movable sludge pump 17 capable of reciprocating in the first collecting ditch 11 and delivering sludge into the first sludge ditch 16, and the like. The water inlet end of the first collecting ditch 11 is used for collecting polishing wastewater, the water outlet end of the first collecting ditch is connected with the first sedimentation tank 12, the first sedimentation tank 12 overflows to the first clean water tank 13, the liquid in the first clean water tank 13 is sent to a polishing process for reuse, the water outlet end of the first sludge ditch 16 is connected with the first sludge collecting tank 14, the bottom of the first sedimentation tank 12 and the first sludge collecting tank 14 are connected with the first filter press 15 through pipelines with filter press pumps and valve groups, and the filtrate outlet of the first filter press 15 is connected with the neutralization reaction tank 8 through pipelines. The round grinding wastewater pretreatment device comprises a second collecting ditch 21, a second sedimentation tank 22, a second clean water tank 23, a second sludge collecting tank 24, a second filter press 25, a second sludge ditch 26 parallel to the second collecting ditch 21, a second movable sludge pump 27 capable of reciprocating in the second collecting ditch 21 and sending sludge into the second sludge ditch 26, and the like, wherein the water inlet end of the second collecting ditch 21 is used for collecting round grinding wastewater, the water outlet end of the second collecting ditch is connected with the second sedimentation tank 22, the second sedimentation tank 22 overflows to the second clean water tank 23, the liquid of the second clean water tank 23 is sent to a round grinding process for recycling, the water outlet end of the second sludge ditch 26 is connected with the second sludge collecting tank 24, the bottom of the second sedimentation tank 22 and the second sludge collecting tank 24 are connected (gated) with the second filter press 25 through pipelines with filter pumps and valve sets, and the filtrate outlet of the second filter press 25 is connected with the neutralization reaction tank 8 and the second clean water tank 23 through pipelines and valve sets (meeting the gating requirements).
Wherein the length of the first collecting channel 11 and the second collecting channel 21 is 30m or more.
Pumps, valves, flow meters and the like are arranged among pipelines among the structures according to the requirements.
Example 2
Referring to fig. 1-2, example 2 provides a wastewater treatment method, employing the wastewater treatment system of the water drill disclosed in example 1, comprising:
Pretreatment of polishing wastewater, as follows:
S101: the first collecting channel 11 collects polishing wastewater and adds a flocculant.
S102: sludge at the bottom of the first collecting channel 11 is sent to the first sludge channel 16 by the first movable sludge pump 17.
S103: the sludge in the first sludge ditch 16 is sent to the first sludge collection tank 14 for storage.
S104: the wastewater in the first collecting channel 11 is sent to a first sedimentation tank 12 for sedimentation.
S105: the clean water from the first sedimentation tank 12 is sent to a first clean water tank 13 for storage, and the clean water meets the reuse standard after detection.
S106: the sludge at the bottom of the first settling tank 12 is intermittently fed to the first filter press 15.
S107: the sludge of the first sludge collection tank 14 is sent to a first filter press 15.
S108: the filtrate (pH 9-10) of the first filter press 15 is sent to the neutralization reaction tank 8, and the filter residue is sent out as solid waste.
S109: the first clean water tank 13 is filled with clean water or not filled with clean water and sent to a polishing process for reuse.
The round mill wastewater pretreatment is as follows:
S201: the second collecting channel 21 collects the circular grinding wastewater and adds a flocculant.
S202: the sludge at the bottom of the second collecting channel 21 is sent to the second sludge channel 26 by the second movable sludge pump 27.
S203: the sludge in the second sludge ditch 26 is sent to the second sludge collection tank 24 for storage.
S204: the wastewater in the second collecting channel 21 is sent to a second sedimentation tank 22 for sedimentation.
S205: the clean water from the second sedimentation tank 22 is sent to a second clean water tank 23 for storage, and the clean water meets the reuse standard after detection.
S206: the sludge at the bottom of the second settling tank 22 is intermittently sent to the second filter press 25, and when the sludge in the second settling tank 22 is sent to the second filter press 25, the sludge in the second sludge collection tank 24 is suspended from being sent to the second filter press 25.
S207: the sludge from the second sludge collection tank 24 is sent to a second filter press 25.
S208: the filter residue (which contains more PVC and contains less silica through detection) obtained by press filtration of the sludge in the second sludge ditch 26 by the second press filter 25 is used for recycling PVC, and the filter residue (which contains more silica and other pollutants through detection and is unfavorable for PVC recycling) obtained by press filtration of the sludge in the second sedimentation tank 22 by the second press filter 25 is sent out as solid waste. The pH value of the filtrate is detected (usually 7.5-9.0), if the pH value is less than 7.8 (the filtrate can float up and down by 0.1 according to the requirement), the filtrate is sent to the second clean water tank 23 (the pH value is detected to meet the recycling standard), and if the pH value is more than or equal to 7.8, the filtrate is sent to the neutralization reaction tank 8 (the pH value is detected to not meet the recycling standard).
S209: the second clean water tank 23 is supplied with clean water or not and sent to a circular grinding process for reuse.
Alkaline wastewater pretreatment is as follows:
s301: adding acid into the neutralization reaction tank 8 to adjust the pH of the wastewater to 6.8-7.5.
S302: and sending the neutralized wastewater to a biochemical treatment device for biochemical treatment.
Wherein, in steps S101 and S201, the flocculant is polyaluminum chloride or the like. In step S102, the first movable sludge pump 17 intermittently moves back and forth; in step S202, the second movable sludge pump 27 intermittently moves back and forth. Specifically, the length of the collecting ditch is 40-60m, the flow of the vertical dredging pump 74 is 0.05-0.1 times of the flow of the wastewater, and the walking sludge pump can move back and forth for 5-8 times/24 h.
Wherein, in the step S101, the dosage of the flocculant is 150-250g/m 3 of wastewater; the flocculation sedimentation capability of the polishing wastewater is weaker, and more flocculant is needed. In the step S201, the dosage of the flocculant is 70-120g/m 3 of wastewater, the flocculation sedimentation capacity of the circular grinding wastewater is strong, and a plurality of flocculant adding functions are as follows: firstly, the residual of the flocculating agent in the PVC is reduced, secondly, most PVC can be separated at the second collecting groove 21, thirdly, even if a smaller amount of flocculating agent is added, the clear liquid can be enabled to meet the recycling standard at the second sedimentation tank 22, and the cost can be reduced.
The "first" and "second" in the embodiments of the present invention only play a role in distinction, and have no other special meaning.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (9)
1. The waste water treatment system of the water drill comprises a biochemical treatment device and is characterized by further comprising a grinding and polishing waste water pretreatment device, a round grinding and polishing waste water pretreatment device and a neutralization reaction tank (8), wherein the grinding and polishing waste water pretreatment device and the round grinding and polishing waste water pretreatment device respectively comprise a collecting ditch, a sedimentation tank, a clean water tank, a sludge collecting tank, a filter press, a sludge ditch parallel to the collecting ditch and a movable sludge pump capable of reciprocating in the collecting ditch and sending sludge into the sludge ditch, the water inlet end of the collecting ditch of the grinding and polishing waste water pretreatment device is used for collecting grinding and polishing waste water, and the water inlet end of the collecting ditch of the round grinding and polishing waste water pretreatment device is used for collecting round grinding and polishing waste water; the water outlet end of the collecting ditch is connected with a corresponding sedimentation tank, the sedimentation tank overflows to a corresponding clean water tank, clear liquid of the clean water tank is recycled, the water outlet end of the sludge ditch is connected with a corresponding sludge collecting tank, the bottom of the sedimentation tank and the sludge collecting tank are connected with a corresponding filter press through pipelines with filter pressing pumps and valve groups, a filtrate outlet of the filter press of the grinding and polishing wastewater pretreatment device is connected with a neutralization reaction tank (8) through a pipeline, a filtrate outlet of the filter press of the circular grinding wastewater pretreatment device is connected with the neutralization reaction tank (8) and the corresponding clean water tank through a pipeline, and the neutralization reaction tank (8) is connected with a biochemical treatment device;
The grinding and polishing wastewater pretreatment device comprises a first collecting ditch (11), a first sedimentation tank (12), a first clean water tank (13), a first sludge collecting tank (14), a first filter press (15), a first sludge ditch (16) parallel to the first collecting ditch (11) and a first movable sludge pump (17) capable of reciprocating in the first collecting ditch (11) and sending sludge into the first sludge ditch (16), wherein the water inlet end of the first collecting ditch (11) is used for collecting grinding and polishing wastewater, the water outlet end of the first collecting ditch is connected with the first sedimentation tank (12), the first sedimentation tank (12) overflows to the first clean water tank (13), the liquid of the first clean water tank (13) is sent to a grinding and polishing process for reuse, the water outlet end of the first sludge ditch (16) is connected with the first sludge collecting tank (14), the bottom of the first sedimentation tank (12) and the first sludge collecting tank (14) are both connected with the first filter press (15) through pipelines with filter press pumps and valve sets, and the first filter press (15) is connected with a filtrate outlet of the first filter press (8) through the filter press;
the circular grinding wastewater pretreatment device comprises a second collecting ditch (21), a second sedimentation tank (22), a second clean water tank (23), a second sludge collecting tank (24), a second filter press (25), a second sludge ditch (26) parallel to the second collecting ditch (21) and a second movable sludge pump (27) capable of reciprocating in the second collecting ditch (21) and sending sludge into the second sludge ditch (26), wherein the water inlet end of the second collecting ditch (21) is used for collecting circular grinding wastewater, the water outlet end of the second collecting ditch is connected with the second sedimentation tank (22), the second sedimentation tank (22) overflows to the second clean water tank (23), the liquid of the second clean water tank (23) is sent to a circular grinding process for recycling, the water outlet end of the second sludge ditch (26) is connected with the second sludge collecting tank (24), the bottom of the second sedimentation tank (22) and the second sludge collecting tank (24) are both connected with the second filter press (25) through pipelines with filter press pumps and valve sets, and the second filter press (25) and the filter press (8) are connected with the second filter press (8) through the outlet and the filter press sets;
the wastewater treatment method adopting the wastewater treatment system comprises the following steps:
Pretreatment of polishing wastewater, as follows:
s101: the first collecting ditch (11) is used for collecting polishing wastewater and adding a flocculating agent;
s102: the sludge at the bottom of the first collecting ditch (11) is sent to a first sludge ditch (16) through a first movable sludge pump (17);
s103: the sludge in the first sludge ditch (16) is sent to a first sludge collecting tank (14) for storage;
S104: the wastewater in the first collecting ditch (11) is sent to a first sedimentation tank (12) for sedimentation;
s105: the clear water of the first sedimentation tank (12) is sent to a first clear water tank (13) for storage;
s106: the sludge at the bottom of the first sedimentation tank (12) is intermittently sent to a first filter press (15);
S107: the sludge in the first sludge collection tank (14) is sent to a first filter press (15);
S108: the filtrate of the first filter press (15) is sent to a neutralization reaction tank (8), and filter residues are sent out as solid waste;
s109: the first clean water tank (13) is filled with clean water or not filled with clean water and sent to a polishing process for reuse;
the round mill wastewater pretreatment is as follows:
S201: the second collecting ditch (21) is used for collecting circular grinding wastewater and adding a flocculating agent;
S202: the sludge at the bottom of the second collecting ditch (21) is sent to a second sludge ditch (26) through a second movable sludge pump (27);
s203: the sludge in the second sludge ditch (26) is sent to a second sludge collecting tank (24) for storage;
s204: the wastewater in the second collecting ditch (21) is sent to a second sedimentation tank (22) for sedimentation;
s205: the clean water of the second sedimentation tank (22) is sent to a second clean water tank (23) for storage;
s206: the sludge at the bottom of the second sedimentation tank (22) is intermittently sent to a second filter press (25);
S207: the sludge in the second sludge collection tank (24) is sent to a second filter press (25);
S208: filter residues obtained by filter pressing of sludge in the second sludge ditch (26) through a second filter press (25) are used for recycling PVC, and filter residues obtained by filter pressing of sludge in the second sedimentation tank (22) through the second filter press (25) are sent out as solid waste; detecting the pH value of the filtrate, if the pH value is less than 7.8, sending the filtrate to a second clean water tank (23), and if the pH value is more than or equal to 7.8, sending the filtrate to a neutralization reaction tank (8);
s209: the second clean water tank (23) is filled with clean water or not filled with clean water and sent to a circular grinding procedure for recycling;
Alkaline wastewater pretreatment is as follows:
s301: adding acid into the neutralization reaction tank (8) to adjust the pH value of the wastewater to 6.8-7.5;
s302: sending the neutralized wastewater to a biochemical treatment device for biochemical treatment;
Wherein in steps S101 and S201, the flocculant is polyaluminum chloride; in step S102, the first walkable sludge pump (17) is intermittently moved back and forth; in step S202, the second walkable sludge pump (27) is intermittently moved back and forth; in the step S101, the dosage of the flocculant is 150-250g/m 3 of wastewater; in step S201, the flocculant is used in an amount of 70-120g/m 3 of wastewater.
2. The waste water treatment system of a water drill according to claim 1, characterized in that the waste water treatment system of a water drill further comprises a flocculant adding device (9), the flocculant adding device (9) being connected to the water inlet ends of the two collecting channels by a pipeline with a control valve.
3. The water drill wastewater treatment system of claim 1, wherein the collection channels are disposed in a fore-aft direction; the movable sludge pump comprises a traveling vehicle (71) capable of moving in a collecting ditch, a plurality of traveling wheels (72) at the bottom of the traveling vehicle (71), two steel wire rope traction structures (73) at the front end and the rear end of the collecting ditch, a vertical dredging pump (74) vertically arranged on the traveling vehicle (71), two guide plates (75) at the left side and the right side of the traveling vehicle (71) and a sludge discharging pipe (76) at the outlet of the vertical dredging pump (74), wherein the guide plates (75) are arranged along the front direction and the rear direction and are positioned at the adjacent inner sides of the corresponding side ditch walls, the traveling wheels (72) are arranged along the left direction and the right direction, the upper side of the traveling vehicle (71) is of a conical hopper-shaped structure with the upper side being big end and the lower, a pump inlet (77) at the bottom of the vertical dredging pump (74) is fixed at the bottom of the conical hopper-shaped structure and penetrates downwards through the traveling vehicle (71), the hopper walls at the left side and the right side of the conical hopper-shaped structure are provided with V-shaped notches (78) which are opened towards the corresponding side ditch walls, and the two steel wire rope traction structures (73) at the front and the rear ends are respectively connected with steel wires (71) which are unwound and respectively; the sludge discharging pipe (76) is positioned above the corresponding collecting ditch and the sludge ditch, and the other end of the sludge discharging pipe is positioned right above the corresponding sludge ditch.
4. A waste water treatment system of a water drill according to claim 3, wherein the number of the travelling wheels (72) is four, the four travelling wheels (72) are arranged in a rectangular shape, two travelling wheels (72) are arranged on the left side and the right side of the travelling vehicle (71) in parallel, a fixing plate (79) is arranged between the V-shaped notch (78) and the guide plate (75) on the same side along the left-right direction, and the travelling wheels (72) are arranged on the lower side of the corresponding fixing plate (79); the front and rear ends of the guide plate (75) are outwards extended and inwards bent relative to the corresponding side of the travelling car (71).
5.A waste water treatment system of a water drill according to claim 3, characterized in that the travelling car (71) comprises a front bucket wall at the front side, a rear bucket wall at the rear side, a left bucket wall at the left side and a right bucket wall at the right side, wherein the front bucket wall is obliquely downwards arranged from front to back, the rear bucket wall is obliquely downwards arranged from back to front, the left bucket wall is obliquely downwards arranged from left to right, the right bucket wall is obliquely downwards arranged from right to left, the front bucket wall, the rear bucket wall, the left bucket wall and the right bucket wall enclose a cone bucket-shaped structure, the middle part of an intersecting line of the front bucket wall and the bottom of the rear bucket wall is provided with a pump inlet (77), the left bucket wall and the right bucket wall are both provided with V-shaped notches (78), and the V-shaped notches (78) are arranged along the left and right directions and the tips of the V-shaped notches are opposite to the pump inlet (77).
6. A waste water treatment system of a water drill according to claim 3, characterized in that a grating (10) is provided in the collecting channel between the water inlet end and the wire rope traction structure (73) on the corresponding side.
7. The wastewater treatment system of the water drill according to claim 1, characterized in that the polishing wastewater pretreatment device further comprises a pre-sedimentation groove (18); the water inlet end of the pre-sedimentation ditch (18) is used for collecting polishing wastewater, the water outlet end of the pre-sedimentation ditch is communicated with the water inlet end of the corresponding collecting ditch, the pre-sedimentation ditch and the corresponding collecting ditch share a ditch wall, and the pre-sedimentation ditch and the corresponding sludge ditch are respectively positioned at two sides of the corresponding collecting ditch; the collecting grooves are arranged side by side with the corresponding sludge grooves and share one groove wall, and the sludge grooves of the grinding and polishing wastewater pretreatment device and the collecting grooves of the round grinding wastewater pretreatment device are arranged side by side and share one groove wall.
8. A method of wastewater treatment employing the wastewater treatment system of claim 7, the method comprising:
Pretreatment of polishing wastewater, as follows:
s101: the first collecting ditch (11) is used for collecting polishing wastewater and adding a flocculating agent;
s102: the sludge at the bottom of the first collecting ditch (11) is sent to a first sludge ditch (16) through a first movable sludge pump (17);
s103: the sludge in the first sludge ditch (16) is sent to a first sludge collecting tank (14) for storage;
S104: the wastewater in the first collecting ditch (11) is sent to a first sedimentation tank (12) for sedimentation;
s105: the clear water of the first sedimentation tank (12) is sent to a first clear water tank (13) for storage;
s106: the sludge at the bottom of the first sedimentation tank (12) is intermittently sent to a first filter press (15);
S107: the sludge in the first sludge collection tank (14) is sent to a first filter press (15);
S108: the filtrate of the first filter press (15) is sent to a neutralization reaction tank (8), and filter residues are sent out as solid waste;
s109: the first clean water tank (13) is filled with clean water or not filled with clean water and sent to a polishing process for reuse;
the round mill wastewater pretreatment is as follows:
S201: the second collecting ditch (21) is used for collecting circular grinding wastewater and adding a flocculating agent;
S202: the sludge at the bottom of the second collecting ditch (21) is sent to a second sludge ditch (26) through a second movable sludge pump (27);
s203: the sludge in the second sludge ditch (26) is sent to a second sludge collecting tank (24) for storage;
s204: the wastewater in the second collecting ditch (21) is sent to a second sedimentation tank (22) for sedimentation;
s205: the clean water of the second sedimentation tank (22) is sent to a second clean water tank (23) for storage;
s206: the sludge at the bottom of the second sedimentation tank (22) is intermittently sent to a second filter press (25);
S207: the sludge in the second sludge collection tank (24) is sent to a second filter press (25);
S208: filter residues obtained by filter pressing of sludge in the second sludge ditch (26) through a second filter press (25) are used for recycling PVC, and filter residues obtained by filter pressing of sludge in the second sedimentation tank (22) through the second filter press (25) are sent out as solid waste; detecting the pH value of the filtrate, if the pH value is less than 7.8, sending the filtrate to a second clean water tank (23), and if the pH value is more than or equal to 7.8, sending the filtrate to a neutralization reaction tank (8);
s209: the second clean water tank (23) is filled with clean water or not filled with clean water and sent to a circular grinding procedure for recycling;
Alkaline wastewater pretreatment is as follows:
s301: adding acid into the neutralization reaction tank (8) to adjust the pH value of the wastewater to 6.8-7.5;
s302: sending the neutralized wastewater to a biochemical treatment device for biochemical treatment;
wherein in steps S101 and S201, the flocculant is polyaluminum chloride; in step S102, the first walkable sludge pump (17) is intermittently moved back and forth; in step S202, the second walkable sludge pump (27) is intermittently moved back and forth.
9. The wastewater treatment method according to claim 8, wherein in step S101, the amount of the flocculant is 150 to 250g/m 3 of wastewater; in step S201, the flocculant is used in an amount of 70-120g/m 3 of wastewater.
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| CN214060156U (en) * | 2020-11-12 | 2021-08-27 | 湖北麻城市嘉丰石材有限公司 | Recycling device for large-size cutting wastewater |
| CN215250022U (en) * | 2021-04-13 | 2021-12-21 | 麻城市天福石业有限公司 | Recycling system for stone plate processing wastewater |
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