CN113045044A

CN113045044A - Acid-base wastewater neutralization treatment system and method

Info

Publication number: CN113045044A
Application number: CN202110308561.8A
Authority: CN
Inventors: 邢红林; 安国清; 邹大春; 金华; 杨叶青; 刁玉华; 刘亮
Original assignee: Anhui Shenlanhua Color Material Co ltd
Current assignee: Anhui Shenlanhua Color Material Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-06-29
Anticipated expiration: 2041-03-23
Also published as: CN113045044B

Abstract

The invention relates to a system and a method for neutralizing and treating acid-base wastewater, wherein the system comprises a primary reaction tank, a primary sedimentation tank, a secondary reaction tank and a secondary sedimentation tank which are sequentially communicated, a primary tank material conveying pump and a primary tank flow increasing pump which are communicated with the primary sedimentation tank, a mixing tank and a transit tank; a primary sedimentation tank is arranged at the bottom of the primary sedimentation tank, a primary tank material conveying pump feeding pipe and a primary tank flow increasing pump feeding pipe are arranged in the material collecting hopper and are respectively communicated with the primary tank material conveying pump and the primary tank flow increasing pump, and the primary tank flow increasing pump feeding pipe is inserted from the primary sedimentation tank; the outlet of the first-stage tank material conveying pump is connected with the inlet of the mixing tank, and the outlet of the first-stage tank flow increasing pump is connected with the inlet of the transfer tank; the liquid discharge port of the transfer tank is connected with the primary reaction tank, and the sludge discharge port is connected with the mixing tank. The neutralization treatment system can timely and quickly solve various blockage problems from multiple aspects, and achieves the purposes of increasing efficiency and reducing cost.

Description

Acid-base wastewater neutralization treatment system and method

Technical Field

The invention relates to the technical field of wastewater treatment, mainly relates to the technical field of acidic or alkaline wastewater treatment, and particularly relates to a system and a method for neutralizing acidic or alkaline wastewater.

Background

In the sewage treatment process, the acid or alkaline waste water is treated by an acid-base neutralization method, i.e. adding an alkaline substance into the acid waste water or adding an acidic substance into the alkali-containing waste water to perform a neutralization reaction to generate neutral salt and water. The method is suitable for various acid-base waste water, and has strong adaptability, so the method is widely used.

In the existing neutralization treatment system, calcium salt and water-insoluble substances generated after reaction and precipitation as well as fine impurities in wastewater precipitate and accumulate, so that pumps and pipelines are easily blocked, or pool bottom is deposited, and finally equipment is blocked and a water treatment system is stopped for cleaning. The silted and blocked waste residues are underwater, water must be drained during dredging, and the shutdown cleaning is time-consuming and labor-consuming, so that the treatment efficiency is reduced, and the cost is increased. Therefore, how to solve the problem of silting and blocking caused by sediment in the neutralization treatment is the key point for improving the neutralization efficiency of the wastewater.

Disclosure of Invention

The technical problem solved by the invention is as follows: in the existing wastewater neutralization treatment system, pipelines and pumps are seriously blocked, a large amount of sludge is deposited at the bottom of a sedimentation tank, the blockage problem caused by sediments needs to be efficiently solved, the operation efficiency of the neutralization treatment system needs to be improved, and the maintenance cost needs to be reduced.

In order to solve the technical problems, the invention provides a system and a method for neutralizing acid-base wastewater, the system is suitable for neutralizing waste acid or waste alkali, and acid or alkali with too high concentration can be diluted by water and then neutralized.

Specifically, aiming at the defects of the prior art, the invention provides the following technical scheme:

the system for neutralizing and treating the acid and alkali wastewater is characterized by comprising a primary reaction tank, a primary sedimentation tank 1, a secondary reaction tank and a secondary sedimentation tank which are sequentially communicated, a primary tank material conveying pump 5 and a primary tank flow increasing pump 7 which are communicated with the primary sedimentation tank, a mixing tank and a transfer tank;

the feeding port of the first-stage reaction tank comprises an acid-base wastewater feeding port and a neutralizing agent feeding port; the top of the first-level sedimentation tank 1 is provided with a first-level tank mud scraper 2, the bottom of the mud scraper is provided with a mud scraper lower scraper 2-1, the bottom of the first-level sedimentation tank 1 is provided with a first-level tank collecting hopper 4 in an inverted cone shape, a first-level tank material-conveying pump inlet pipe 6 is arranged in the first-level tank collecting hopper and is communicated with the first-level tank material-conveying pump 5, a first-level tank material-increasing pump inlet pipe 9 is arranged in the collecting hopper 4 and is communicated with the first-level tank material-increasing pump 7, the first-level tank material-increasing pump inlet pipe 9 is inserted from the first-level sedimentation tank liquid, the vertical height of the first-level tank material-increasing pump inlet pipe 9 from the bottom of the collecting hopper is greater than that of the first-level tank material-conveying pump (6) from the bottom of the collecting hopper, a material-increasing pump negative pressure bag 8 is arranged between the collecting hopper 4 and the first, the outlet of the first-stage pool flow increasing pump 7 is connected with the inlet of the transfer pool, one end of the first-stage pool material conveying pump 5, which is close to the first-stage sedimentation pool, is connected with one end of the first-stage pool flow increasing pump 7, which is close to the first-stage sedimentation pool, through a first flow guide pipeline, a first flow guide valve 11 is arranged on the first flow guide pipeline, one end of the first-stage pool material conveying pump 5, which is far away from the first-stage sedimentation pool, is connected with one end of the first-stage pool flow increasing pump 7, which is far away from the first-stage sedimentation pool, through a second flow guide pipeline, and a second flow;

the outlet of the mixing tank is sequentially connected with a pressure filtration pump and a pressure filter, the liquid outlet of the pressure filter is connected with a primary sedimentation tank, the liquid discharge port of the transfer tank is connected with a primary reaction tank, and the sludge discharge port is connected with the mixing tank;

the secondary reaction tank material inlet comprises a medicament material inlet, the secondary sedimentation tank is provided with a clear liquid outlet and a sludge outlet, and the sludge outlet is connected with the mixing tank.

Preferably, in the system for neutralizing and treating the acidic and alkaline wastewater, the vertical height from the pipe orifice of the feed delivery pump feed pipe 6 to the bottom of the collecting hopper is a, and the vertical height from the pipe orifice of the feed increase pump feed pipe 9 to the bottom of the collecting hopper is b, wherein a/l is not less than 1/10 and not more than 1/4, and preferably, a/l is not less than 1/9 and not more than 1/5; 1/5 < b/l < 1, preferably 1/3. ltoreq. b/l < 1.

Preferably, in the above-mentioned acid-base wastewater neutralization treatment system, the inlet and outlet of the first-stage pond pump 5 are respectively provided with a first-stage pond pump feed valve 10 and a first-stage pond pump discharge valve 21, the inlet and outlet of the first-stage pond pump 7 are respectively provided with a first-stage pond flow-increasing pump feed valve 12 and a first-stage pond flow-increasing pump discharge valve 15, the mixing pond inlet is provided with a mixing pond feed valve 20, the transfer pond inlet is provided with a transfer pond feed valve 18, one end of the first-stage pond pump discharge valve 21, which is far away from the first-stage pond pump, is communicated with one end of the first-stage pond flow-increasing pump discharge valve 15, which is far away from the first-stage pond flow-increasing pump, through a second diversion.

Preferably, in the system for neutralizing and treating the acidic and alkaline wastewater, the power of the first-stage pool flow-increasing pump 7 is 6-10 times that of the first-stage pool material-conveying pump 5.

Preferably, in the system for neutralizing and treating acidic and alkaline wastewater, the lift of the first-stage pond material delivery pump 5 is 12-15 m, the lift of the first-stage pond flow increasing pump 7 is 40-50 m, the power of the first-stage pond material delivery pump is 2.2-3 KW, and the power of the first-stage pond flow increasing pump 7 is 18.5-30 KW.

Preferably, in the neutralization treatment system for acidic and alkaline wastewater, the neutralization treatment system further comprises a PLC controller, and a single chip microcomputer is installed in the PLC controller; a pH measuring electrode is arranged in the primary reaction tank, and a neutralizer feeding port is connected with a neutralizer delivery pump; the pH measuring electrode is electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is electrically connected with the neutralizer delivery pump, the first-stage pool delivery pump 5, the first-stage pool flow increasing pump 15, the first diversion valve 11 and the second diversion valve 19.

Preferably, in the system for neutralizing and treating acidic and alkaline wastewater, the output end of the single chip microcomputer is electrically connected to the first-stage tank feed pump feed valve 10, the first-stage tank feed pump discharge valve 21, the first-stage tank flow-increasing pump feed valve 12, the first-stage tank flow-increasing pump feed valve 15, the mixing tank feed valve 20 and the transfer tank feed valve 18.

Preferably, in the system for neutralizing and treating the acidic and alkaline wastewater, a motor of the material conveying pump 5 of the primary tank is provided with a current sensor, and the current sensor is electrically connected with an input end of the single chip microcomputer.

Preferably, in the system for neutralizing and treating acidic and alkaline wastewater, a third diversion valve 13 is installed on a first diversion pipeline between the first diversion valve 11 and the inlet of the primary tank flow-increasing pump 7, one end of the third diversion valve 13, which is far away from the primary tank flow-increasing pump 7, is communicated with one end of the primary tank flow-increasing pump discharge valve 15, which is far away from the primary tank flow-increasing pump, through a third diversion pipeline, a fourth diversion valve 14 is arranged at one end of the third diversion pipeline, which is close to the third diversion valve 13, and a fifth diversion valve 16 is arranged at one end of the third diversion pipeline, which is close to the primary tank flow-increasing pump discharge valve 15.

Preferably, in the acid-base wastewater neutralization treatment system, the top of the primary sedimentation tank is provided with a mud scraper rack platform 2-5, the mud scraper rack platform is provided with a mud scraper lifting motor 2-3, the lifting motor is connected with a mud scraper lower scraper 2-1 through a mud scraper lifting steel wire rope 2-4, and a mud scraper walking wheel 2-2 is arranged between the mud scraper rack platform and the sedimentation tank wall 1-2.

Preferably, in the acid-base wastewater neutralization treatment system, a stirring moving frame 3-6 is arranged on the mud scraper rack platform 2-5, a stirring moving frame driving motor 3-7 is arranged on the stirring moving frame 3-6, a stirring moving frame traveling wheel 3-1 is arranged at the bottom of the stirring moving frame, a sliding rail is arranged on the mud scraper rack platform 2-5 at a position corresponding to the stirring moving frame traveling wheel 3-1, and the mud scraper traveling wheel 2-2 is perpendicular to the traveling track of the stirring moving frame traveling wheel 3-1; the stirring device is characterized in that an adjusting disc support frame 3-5 is arranged at one end of the stirring moving frame 3-6, an adjusting disc 3-4 is arranged at the top end of the adjusting disc support frame, an adjusting rod 3-3 is arranged in the middle of the adjusting disc 3-4, the adjusting disc and the adjusting rod are connected in a screw thread mode, a stirring main frame 3-2 is connected to the bottom of the adjusting rod 3-3, the stirring main frame 3-2 extends into the bottom of the primary sedimentation tank, and a stirring paddle is connected to the bottom end of the stirring main frame 3-2.

Preferably, among the above-mentioned acid-base wastewater neutralization treatment system, wherein, the structure of second grade sedimentation tank and the pipeline of connection with the one-level sedimentation tank is the same, second grade sedimentation tank bottom is provided with second grade pond material collecting opening, and second grade pond material collecting hopper has second grade pond increasing flow pump and second grade pond conveying pump through second grade pond increasing flow pump inlet pipe and second grade pond conveying pump inlet pipe intercommunication respectively, first grade pond increasing flow pump export and second grade pond increasing flow pump export intercommunication.

Preferably, second grade pond flow increasing pump inlet pipe is followed insert on the second grade sedimentation tank liquid, be provided with flow increasing pump negative pressure package between second grade pond collecting hopper and the second grade pond flow increasing pump, second grade pond flow increasing pump export with mix pond access connection, second grade pond flow increasing pump export with transfer pond access connection, second grade pond flow increasing pump be close to the one end of second grade sedimentation tank with the second grade pond flow increasing pump is close to the one end of second grade sedimentation tank and passes through the first water conservancy diversion pipe connection in second grade pond, be provided with the first blast valve in second grade pond on the first water conservancy diversion pipeline, the second grade pond flow increasing pump keep away from the one end of second grade sedimentation tank with the second grade pond flow increasing pump keeps away from the one end of second grade sedimentation tank and passes through second grade pond second water conservancy diversion pipe connection, be provided with second grade pond second blast valve on the second water conservancy diversion pipeline.

Preferably, second grade pond delivery pump import and export are provided with second grade pond delivery pump feed valve and second grade pond delivery pump bleeder valve respectively, the import and the export of second grade pond flow increasing pump are provided with second grade pond flow increasing pump feed valve and second grade pond flow increasing pump discharge valve respectively, it is provided with mixed pond feed valve to mix the pond import, the pond import of transferring is provided with the pond feed valve of transferring, the second grade pond delivery pump bleeder valve keep away from the one end of second grade pond delivery pump with the second grade pond flow increasing pump discharge valve keeps away from the one end of second grade pond flow increasing pump and passes through second grade pond second water conservancy diversion pipeline intercommunication.

Preferably, a second-stage pool third diversion valve is installed on a second-stage pool first diversion pipeline between the second-stage pool first diversion valve and the second-stage pool flow increasing pump inlet, one end, far away from the second-stage pool flow increasing pump, of the second-stage pool third diversion valve is communicated with one end, far away from the second-stage pool flow increasing pump, of the second-stage pool flow increasing pump discharge valve through the second-stage pool third diversion pipeline, a second-stage pool fourth diversion valve is arranged at one end, close to the third diversion valve, of the third diversion pipeline, and a second-stage pool fifth diversion valve is arranged at one end, close to the second-stage pool flow increasing pump discharge valve.

Preferably, a pipeline between the fourth diversion valve of the first-stage tank and the fifth diversion valve of the first-stage tank is communicated with a pipeline between the fourth diversion valve of the second-stage tank and the fifth diversion valve of the second-stage tank, and a sixth diversion valve (17) is arranged on the communicated pipeline.

Preferably, 4 ~ 6 vertically arranged cisterns are separated into by the baffle that transversely sets up to one-level reaction tank inside, install agitated vessel in every cisterns, and the stirring speed is fast and slow in turn, and one-level reaction tank curb plate is connected with the one-level sedimentation tank.

Preferably, the fast stirring speed is 50-60 rpm and the slow stirring speed is 30-40 rpm.

Preferably, a strip-shaped homogenizing pool is arranged between the side plate of the primary reaction pool and the primary sedimentation pool.

Preferably, the chemical added to the chemical inlet of the secondary sedimentation tank comprises polyaluminium chloride and polyacrylamide.

The invention also provides a method for neutralizing the acid-base wastewater, which is characterized by comprising the following steps:

opening the acid-base wastewater neutralization treatment system, allowing the wastewater to enter a primary reaction tank, adding a neutralizing agent into a neutralizing agent inlet, reacting with the wastewater, overflowing into a primary sedimentation tank, allowing supernatant to overflow into a secondary reaction tank, adding a flocculating agent into a medicament inlet, mixing, reacting, allowing the supernatant to overflow into a secondary sedimentation tank, allowing the supernatant to precipitate, and discharging the supernatant; the mud scraper scrapes the sediment slurry in the primary sedimentation tank into the primary tank aggregate bin, and any one of the following conveying modes is carried out:

(1) and (3) a conventional conveying mode: slurry is pumped to a mixing tank by a first-stage tank delivery pump, and is subjected to filter pressing by a filter pressing pump, the obtained filtrate is introduced into a first-stage sedimentation tank, and sludge is discharged;

(2) flow increasing emptying mode: opening a first-stage pool flow increasing pump and a first diversion valve, pumping the slurry to a transfer pool after the slurry passes through a material conveying pump feeding pipe (6) and a first diversion pipe and is pressurized by the first-stage pool flow increasing pump, overflowing the clear liquid at the upper part of the transfer pool to a first-stage reaction pool, and introducing the slurry at the lower part into a mixing pool;

(3) automatic recoil mode: closing the first diversion valve, opening the second diversion valve, allowing slurry in the primary sedimentation tank to flow through a feeding pipe of the primary tank flow-increasing pump and a negative pressure bag, entering the primary tank flow-increasing pump, and then passing through a second diversion pipe, the primary tank material-conveying pump and a feeding pipe of the primary tank material-conveying pump to back flush an inlet pipe and an outlet pipe of the primary tank material-conveying pump;

and (4) allowing sludge at the bottom of the secondary sedimentation tank to enter a mixing tank, performing filter pressing, introducing filtrate into the primary sedimentation tank, and discharging the sludge.

Preferably, in the neutralization method, an inlet and an outlet of the first-stage tank material delivery pump 5 are respectively provided with a first-stage tank material delivery pump feed valve 10 and a first-stage tank material delivery pump discharge valve 21, an inlet and an outlet of the first-stage tank pump 7 are respectively provided with a first-stage tank flow-increasing pump feed valve 12 and a first-stage tank flow-increasing pump discharge valve 15, an inlet of the mixing tank is provided with a mixing tank feed valve 20, an inlet of the transfer tank is provided with a transfer tank feed valve 18, and one end of the first-stage tank material delivery pump discharge valve 21, which is far away from the first-stage tank material delivery pump, is communicated with one end of the first-stage tank flow-increasing pump discharge valve 15, which is far away from the;

the mud scraper scrapes the sediment slurry in the primary sedimentation tank into the primary tank aggregate bin, and any one of the following conveying modes is carried out:

(1) and (3) a conventional conveying mode: opening a feeding valve 10 of a first-stage tank material conveying pump, opening a discharging valve 21 of the first-stage tank material conveying pump and a feeding valve 20 of a mixing tank, closing the rest valves, starting the first-stage tank material conveying pump to operate, pumping slurry from a slurry collecting hopper 4, the first-stage tank into the mixing tank through a material conveying pump feeding pipe 6 and a first-stage tank material conveying pump 5, and finally pumping the slurry into a filter press through a filter press pump of the mixing tank through a discharging valve 21 of the first-stage tank material conveying pump and a feeding valve 20 of the mixing tank;

(2) flow increasing emptying mode: opening a feeding valve 10 and a first diversion valve 11 of a first-stage pond material conveying pump, a feeding valve 15 and a transferring pond feeding valve 18 of a first-stage pond flow increasing pump, closing the other valves, starting the flow increasing pumps, pumping the slurry to a transferring pond through a feeding pipe 6 of the first-stage pond material conveying pump and a first-stage pond flow increasing pump 7, and overflowing the supernatant on the upper part of the transferring pond to a first-stage reaction pond;

(3) automatic recoil mode: opening a first-stage pond flow increasing pump feed valve 12, a first-stage pond flow increasing pump discharge valve 15, a second diversion valve 19, a first-stage pond material conveying pump discharge valve 21 and a first-stage pond material conveying pump feed valve 10, closing other valves, starting a first-stage pond flow increasing pump 7, enabling water to flow through a first-stage pond flow increasing pump feed pipe 9 and a negative pressure bag 8, boosting through the flow increasing pump, and then backflushing an inlet and outlet pipeline of the material conveying pump through the first-stage pond flow increasing pump discharge valve 15, the second diversion valve 19, the first-stage pond material conveying pump discharge valve 21 and the first-stage pond material conveying pump feed valve 10.

Preferably, in a conventional conveying mode, when the working current of the material conveying pump is lower than 65% -80% of the normal working current, the current increasing emptying mode is started, and when the current increasing emptying mode runs for 2-3 minutes and the working current of the material conveying pump is still lower than 65% -80% of the normal working current, the automatic backflushing mode is started.

Preferably, in the neutralization method, a third diversion valve 13 is installed on a first diversion pipeline between the first diversion valve 11 and the inlet of the primary pool flow-increasing pump 7, one end of the third diversion valve 13, which is far away from the primary pool flow-increasing pump 7, is communicated with one end of the primary pool flow-increasing pump discharge valve 15, which is far away from the primary pool flow-increasing pump, through a third diversion pipeline, a fourth diversion valve 14 is arranged at one end, which is close to the third diversion valve 13, of the third diversion pipeline, and a fifth diversion valve 16 is arranged at one end, which is close to the primary pool flow-increasing pump discharge valve 15;

when sludge deposits at the inlet and the outlet of a material delivery pump of the first-level tank, a manual backflushing mode is started: opening a first-stage pond flow increasing pump feed valve 12, a first-stage pond flow increasing pump feed valve 15, a fifth diversion valve 16, a fourth diversion valve 14, a first diversion valve 11 and a first-stage pond feed delivery pump feed valve 10, closing other valves, leading water to flow through a first-stage pond flow increasing pump feed pipe 9 and a negative pressure bag 8, boosting the pressure through a flow increasing pump, sequentially passing through the first-stage pond flow increasing pump feed valve 15, the fifth diversion valve 16, the fourth diversion valve 14, the first diversion valve 11 and the first-stage pond feed delivery pump feed valve 10, and performing backflushing on a pipeline at the inlet of the first-stage pond feed delivery pump independently.

Preferably, when sludge deposition at the inlet and the outlet of the material delivery pump of the first-stage tank is serious, the manual backflushing mode is started, and after the pipeline at the inlet of the material delivery pump of the first-stage tank is backflushed, the automatic backflushing mode is started to backflush the pipeline at the inlet and the outlet of the material delivery pump of the first-stage tank.

Preferably, in the neutralization method, a mud scraper rack platform 2-5 is installed at the top of the primary sedimentation tank, a mud scraper lifting motor 2-3 is installed on the mud scraper rack platform, the lifting motor is connected with a mud scraper lower scraper 2-1 through a mud scraper lifting steel wire rope 2-4, and a mud scraper travelling wheel 2-2 is arranged between the mud scraper rack platform and the sedimentation tank wall 1-2;

after the materials in the first-level sedimentation tank are precipitated, the travelling wheels of the mud scraper drive the mud scraper to move back and forth on the surface of the sedimentation tank, and the lifting motor 2-3 of the mud scraper drives the lower scraper of the mud scraper to move through the lifting steel wire rope 2-4, so that the precipitates are hung in the collecting hopper.

Preferably, in the neutralization method, a stirring moving frame 3-6 is arranged on the mud scraper rack platform 2-5, a stirring moving frame driving motor 3-7 is arranged on the stirring moving frame 3-6, a stirring moving frame traveling wheel 3-1 is arranged at the bottom of the stirring moving frame, a sliding rail is arranged on the mud scraper rack platform 2-5 at a position corresponding to the stirring moving frame traveling wheel 3-1, and the mud scraper traveling wheel 2-2 is perpendicular to the traveling track of the stirring moving frame traveling wheel 3-1; the stirring device is characterized in that an adjusting disc support frame 3-5 is arranged at one end of the stirring moving frame 3-6, an adjusting disc 3-4 is arranged at the top end of the adjusting disc support frame, an adjusting rod 3-3 is arranged in the middle of the adjusting disc 3-4, the adjusting disc and the adjusting rod are connected in a screw thread mode, a stirring main frame 3-2 is connected to the bottom of the adjusting rod 3-3, the stirring main frame 3-2 extends into the bottom of the primary sedimentation tank, and a stirring paddle is connected to the bottom end of the stirring main frame 3-2. (ii) a

When the sludge in the primary sedimentation tank is excessive, the sludge scraper moves back and forth on the surface of the sedimentation tank, the movable frame 3-6 moves left and right under the driving of the movable frame driving motor 3-7, the adjusting disc 3-4 is rotated at the same time, the height position of the stirring main frame 3-2 is changed, and the sludge at the bottom of the primary sedimentation tank is scattered and scraped into the collecting hopper.

Preferably, in the neutralization method, the structure and the connecting pipeline of the second-stage sedimentation tank are the same as those of the first-stage sedimentation tank, a second-stage tank material collecting port is arranged at the bottom of the second-stage sedimentation tank, the second-stage tank material collecting hopper is communicated with a second-stage tank flow increasing pump and a second-stage tank material conveying pump through a second-stage tank flow increasing pump feeding pipe and a second-stage tank material conveying pump feeding pipe respectively, and a first-stage tank flow increasing pump outlet is communicated with a second-stage tank flow increasing pump outlet;

when sludge deposits at the inlet and the outlet of the first-stage tank delivery pump or the second-stage tank delivery pump, the first-stage tank delivery pump can be backflushed by the second-stage tank booster pump through switching of the valve, or the second-stage tank delivery pump can be backflushed by the first-stage tank booster pump.

The invention has the advantages that: the invention can effectively avoid the phenomenon of cleaning the system when the system is blocked and stopped, automatically implements back flushing in a non-stop state, quickly solves various blocking problems from multiple aspects in time, effectively prolongs the continuous operation time of the treatment system, and ensures the continuous operation of the neutralization treatment system so as to achieve the purposes of increasing efficiency and reducing cost, and has the following characteristics: (1) the double pipelines and the double pumps (different in lift) are adopted, the supporting facilities of the two-stage tank are mutually communicated, the automatic switching is mutually backflushed, and the problem of sludge blockage is quickly solved. (2) The middle tank is added for buffer storage in parallel connection with the mixing tank, so that the normal operation of a filtering system of the mixing tank is guaranteed, and the blockage of the mixing tank caused by the fact that a large amount of sludge is deposited and backflushed to enter the mixing tank is avoided. (3) Effectively utilize mud scraper installation dive agitating unit, will mud scraper and dive agitating unit combine, solve because bottom of the pool mud piles up the back, mud scraper blade is by the lifting, jamming problem during reverse gyration. Thereby ensuring the continuous and stable wastewater neutralization treatment system.

Drawings

FIG. 1 is a schematic view of the structure of a primary reaction tank in example 1.

FIG. 2 is a schematic view showing the structure of a primary sedimentation tank in example 1.

FIG. 3 is a schematic piping diagram of the primary sedimentation tank in example 1.

FIG. 4 is a process flow diagram of example 1.

FIG. 5 is a schematic piping diagram of the primary sedimentation tank in example 2.

FIG. 6 is a process flow diagram of example 3.

FIG. 7 is a schematic line view of a primary sedimentation tank in example 3.

Fig. 8 is a schematic front view of the submersible stirring apparatus in example 4.

Fig. 9 is a schematic side view of the submersible stirring apparatus of example 4.

Wherein, 1 is a first-stage sedimentation tank, 2 is a first-stage sludge scraper, 3 is a submersible stirring device, 4 is a first-stage tank collection hopper, 5 is a first-stage tank delivery pump, 6 is a first-stage tank delivery pump feeding pipe, 7 is a first-stage tank pump boosting pump, 8 is a negative pressure bag, 9 is a first-stage tank pump feeding pipe, 10 is a first-stage tank delivery pump feeding valve, 11 is a first diversion valve, 12 is a first-stage tank pump feeding valve, 13 is a third diversion valve, 14 is a fourth diversion valve, 15 is a first-stage tank pump feeding valve, 16 is a fifth diversion valve, 17 is a sixth diversion valve, 18 is a transfer tank feeding valve, 19 is a second diversion valve, 20 is a mixing tank feeding valve, and 21 is a first-stage tank delivery pump discharging valve; 1-2 is a first-level sedimentation tank wall, 2-1 is a scraper lower scraper, 2-2 is a scraper walking wheel, 2-3 is a scraper lifting motor, 2-4 is a scraper lifting steel wire rope, 2-5 is a scraper rack platform, 3-1 is a submersible stirring moving rack walking wheel, 3-2 is a stirring main rack, 3-3 is a regulating rod, 3-4 is a regulating disk, 3-5 is a regulating disk supporting frame, 3-6 is a stirring moving rack, and 3-7 is a stirring moving rack driving motor.

Detailed Description

In view of the problems that the operation efficiency of the existing acid-base wastewater neutralization treatment system needs to be improved and the maintenance cost needs to be reduced, the invention provides a system and a method for neutralizing acid-base wastewater.

In a preferred embodiment, the wastewater neutralization treatment system of the present invention comprises: the one-level reaction tank, the one-level sedimentation tank, the one-level pond mud scraper, the one-level pond collecting hopper, the defeated material pump in one-level pond, the one-level pond pump that increases flow, the second grade reaction tank, the second grade sedimentation tank, the second grade pond mud scraper, the second grade pond collecting hopper, the defeated material pump in second grade pond, the second grade pond pump that increases flow, mud transfer pond, the mud mixing tank, the pressure filtration pump, the pressure filter.

Taking the acid wastewater as an example, the water flow trend is as follows: the acidic waste water enters a first-stage reaction tank, wherein the first-stage reaction tank and a second-stage reaction tank are respectively composed of 4 small tanks, stirring equipment is respectively arranged, a fast mixing reaction tank, a slow mixing reaction tank, a fast mixing reaction tank and a slow mixing reaction tank are sequentially arranged according to the rotating speed of stirring slurry, so that the aqueous solution is fully mixed and neutralized, the waste water is reacted with a neutralizing agent (such as an alkaline substance, such as a calcium oxide aqueous solution) and overflows into a first-stage sedimentation tank, after sedimentation, supernatant liquid overflows into a second-stage reaction tank, then the secondary reaction tank is mixed with an added medicament (such as a flocculating agent, namely polyaluminium chloride and polyacrylamide) for reaction, the secondary sedimentation tank is used for secondary sedimentation, and clear liquid is discharged. The sewage and slurry trend is as follows: the acidic wastewater enters a first-stage reaction tank, reacts with alkaline substances and then enters a first-stage sedimentation tank, and after sedimentation, generated water-insoluble substances are precipitated at the bottom of the tank. The bottom of the pool is a rectangular flat bottom (for example, the length is 40 meters, and the width is 7.5 meters). The precipitated waste residue sludge is scraped into a collecting hopper of the primary tank under the pushing of a scraper of a mud scraper, and then is pumped to a mixing tank by a delivery pump of the primary tank, and is pumped to a filter pressing process by a filter pressing pump of the mixing tank.

In another preferred embodiment, the neutralization treatment system and method of the present invention have the following features:

(1) the PH is adjusted, the valve is opened and closed, and the equipment is controlled by a PLC.

(2) Two pumps with different flow rates and lifts are adopted, and the PLC control system automatically switches the starting and stopping of equipment and the valve switching of a pipeline under a normal state, so that the material conveying pump is ensured to be normally free of material blockage, and the purpose of automatic continuous operation is realized.

Preferably, the reference process index and configuration: water treatment flow rate 200m³The flow selected by the delivery pump is 25m³The delivery lift is 12 m. The flow rate of the flow increasing pump is 100m³A/h head of 50And m, feeding the conveyed sludge into a transfer tank, referring to the filtering capacity of the filter in unit time and the unit bearing capacity of the mixing tank, feeding the sludge into the mixing tank in batches according to the amount, and finally feeding the sludge into a filter press for filtering.

(3) The multichannel intercommunication design of pipeline, multiple operating mode mutually supports, can ensure all can realize the pressure boost in each pipeline and wash, reduces the dismouting clearance of equipment, saves time and cost.

(4) The inlet pipe of the flow increasing pump is inserted into the pool bottom from the liquid level, and the insertion depth can be adjusted. When the sludge in the collecting hopper is judged to be excessive, the depth of the feeding pipe inserted into the water bottom is adjusted, the flow increasing pump is started, the sludge in the collecting hopper is pumped out from shallow to deep, then the pump and the pipeline are backflushed, and dredging recovery is carried out.

(5) The sludge at the bottom of the pool is removed by adopting conventional configuration, a reciprocating type sludge scraper is arranged on the surface of the pool, a scraper of the sludge scraper is contacted with the bottom of the pool, and the sludge is scraped into a collecting hopper in time through the reciprocating movement of the sludge scraper and is pumped away by a pump. Utilize mud scraper installation adjustable dive agitating unit, supplementary mud scraper is clear away the long-pending silt of bottom of the pool, and the guarantee bottom of the pool does not have long-pending silt.

In another preferred embodiment, considering that the blockage occurs in the collecting hopper and the feeding pipe of the conveying pump, the invention sets a flow-increasing emptying mode for the system, in which the sludge in the feeding pipe of the conveying pump is taken away during the process of sucking away the sludge by the high-flow-increasing pump, and the feeding pipe of the conveying pump is emptied while the collecting hopper is emptied. The flow increasing pump is used for short-time auxiliary cleaning, does not need continuous operation, can be cleaned after being disassembled, and does not influence the normal operation of a continuous neutralization treatment system when the flow increasing pump and a pipeline are disassembled and cleaned. When the inlet pipe and the outlet pipe of the material conveying pump are blocked, an automatic backflushing mode is set, and the inlet pipe and the outlet pipe of the material conveying pump are backflushed. When the inlet and the outlet of the material delivery pump are seriously blocked and cannot run, a manual backflushing mode is set, the pipeline at the inlet of the material delivery pump is backflushed, and then an automatic backflushing mode is started to backflush the inlet and the outlet of the material delivery pump.

In the invention, the inlet of the pump refers to a pipe orifice close to one end of the sedimentation tank, and the outlet of the pump refers to a pipe orifice far away from one end of the sedimentation tank. The PLC refers to a programmable logic controller.

The system and method for neutralizing acidic and alkaline waste water according to the present invention are further illustrated by the following specific examples.

Example 1

This embodiment waste water neutralization treatment system is specifically including the one-level reaction tank, one-level sedimentation tank, second grade reaction tank and the second grade sedimentation tank that communicate in proper order to and mix pond, transfer pond and PLC controller.

(1) First-stage reaction tank

The one-level reaction tank material inlet comprises a wastewater material inlet and a neutralizer material inlet, an overflow port arranged on the side part of the one-level reaction tank is communicated with a water inlet of the one-level sedimentation tank 1, stirring equipment is arranged in the one-level reaction tank, a pH measuring electrode is arranged inside the one-level reaction tank, and the neutralizer material inlet is connected with a neutralizer delivery pump.

The structure of the first-stage reaction tank is schematically shown in figure 1, the interior of the first-stage reaction tank is divided into 4 small tanks which are vertically arranged by a transverse partition plate, each small tank is internally provided with stirring equipment, small holes are arranged on the partition plate between the 4 small tanks to enable the small tanks to be mutually communicated, a wastewater inlet is arranged on the first small tank and flows along wastewater, according to the rotating speed of the stirring paddle, the fast mixing reaction tank, the slow mixing reaction tank, the fast mixing reaction tank and the slow mixing reaction tank are arranged in sequence to ensure that the water solution is fully mixed and neutralized, wherein the stirring speed of the rapid mixing reaction tank is 50-60 revolutions per minute, preferably 50-55 revolutions per minute, e.g. 51 rpm, and the stirring speed of the slow mixing reaction tank is 30-40 rpm, preferably 30-35 rpm, e.g. 34 rpm. The side plate of the first-level reaction tank is connected with the first-level sedimentation tank 1, the side plate is perpendicular to the partition plate inside the reaction tank, and an overflow port is formed in the side plate, so that wastewater in the reaction tank overflows into the first-level sedimentation tank. Preferably, a strip-shaped homogenizing pool is further arranged between the first-stage reaction pool and the first-stage sedimentation pool, and the wastewater in the first-stage reaction pool overflows into the first-stage sedimentation pool after passing through the homogenizing pool. Preferably, the secondary reaction tank has the same structure as the primary reaction tank.

(2) First-stage sedimentation tank

The structure schematic diagram of one-level sedimentation tank is shown in fig. 2, and the overflow mouth that the lateral part of one-level sedimentation tank 1 set up communicates with the water inlet of second grade reaction tank, and the top of one-level sedimentation tank 1 is provided with one-level pond mud scraper 2, and mud scraper installs scraper lower scraper blade 2-1 down in the mud scraper bottom, scraper blade 2-1 stretches into the sedimentation tank bottom down, and 1 bottom in one-level sedimentation tank is provided with one-level pond collecting hopper 4, collecting hopper 4 is horn mouth toper fill, and the horn mouth communicates with each other with the sedimentation tank bottom.

The pipeline schematic diagram of one-level sedimentation tank is shown in fig. 3, 4 lower parts of collecting hopper are provided with one-level pond delivery pump inlet pipe 6, communicate with one-level pond delivery pump 5, the inside one-level pond flow increasing pump inlet pipe 9 that is provided with of collecting hopper 4, just flow increasing pump inlet pipe is greater than apart from the vertical height of collecting hopper bottom the delivery pump inlet pipe 6 is apart from the vertical height of collecting hopper bottom, flow increasing pump inlet pipe and one-level pond flow increasing pump 7 intercommunication, be provided with flow increasing pump negative pressure package 8 between collecting hopper 4 and the flow increasing pump 7. Assuming that the depth of the collecting hopper is l, the vertical height from the pipe orifice of the feed delivery pump feed pipe 6 to the bottom of the collecting hopper is a, and the vertical height from the pipe orifice of the flow-increasing pump feed pipe 9 to the bottom of the collecting hopper is b, then a/l is greater than or equal to 1/10 and less than or equal to 1/4, preferably, a/l is greater than or equal to 1/9 and less than or equal to 1/5; 1/5 < b/l < 1, preferably 1/3. ltoreq. b/l < 1. For example, in this embodiment, the depth of the collection hopper is 1.7m, the vertical height of the pipe orifice of the pump feeding pipe 6 from the bottom of the collection hopper is 20-30 cm, the vertical height of the pipe orifice of the flow-increasing pump feeding pipe 9 from the bottom of the collection hopper is about 60cm, and the height of the pipe orifice of the flow-increasing pump feeding pipe 9 can be adjusted upwards within 1m, so that the pipe orifice of the flow-increasing pump feeding pipe 9 can reach the upper position at the highest position, and the pipe orifice is not covered by sludge.

The outlet of the material delivery pump 5 is connected with the inlet of the mixing tank, and the outlet of the flow increasing pump is connected with the inlet of the transfer tank. The inlet and the outlet of the delivery pump 5 are respectively provided with a delivery pump feed valve 10 and a delivery pump discharge valve 21, the inlet and the outlet of the flow-increasing pump 7 are respectively provided with a flow-increasing pump feed valve 12 and a flow-increasing pump discharge valve 15, the inlet (the port close to the primary sedimentation tank) of the delivery pump 5 and the inlet (the port close to the primary sedimentation tank) of the flow-increasing pump 7 are communicated through a first flow guide pipeline, and are provided with a first flow guide valve 11; the inlet of the mixing tank is provided with a feed valve 20, the inlet of the transfer tank is provided with a feed valve 18, one end of a discharge valve 21 of the delivery pump, which is far away from the delivery pump, is communicated with one end of a discharge valve 15 of the flow-increasing pump, which is far away from the flow-increasing pump, through a second flow guide pipeline, and is provided with a second flow guide valve 19.

Wherein, the power of the first-stage pond pump-increasing pump is larger than that of the first-stage pond delivery pump, for example, in this embodiment, the delivery pump flow is 25-40 m³The lift is 12-15 m, and the power is 2.2-3 kw. The flow rate of the flow increasing pump is 100-120 m³The lift is 40-50 m, and the power is 18.5-30 kw. .

Preferably, the valves are pneumatic valves, are connected with a PLC (programmable logic controller), and can automatically switch a conventional slurry conveying mode, a flow increasing and emptying mode and a backflushing mode by controlling the opening and closing of the valves, and the method comprises the following specific steps:

conventional transport mode water flow path:

opening the feeding valve 10 of the material conveying pump, opening the discharging valve 21 of the material conveying pump and the feeding valve 20 of the mixing tank, closing all the other valves, starting the material conveying pump to operate, pumping the waste water containing sludge into the mixing tank through the material conveying pump feeding pipe 6 and the material conveying pump 5 and through the discharging valve 21 of the material conveying pump and the feeding valve 20 of the mixing tank, and finally pumping the waste water into the filter press through the filter press pump of the mixing tank.

Increasing flow and emptying a water flow path:

opening a feed valve 10 of a feed delivery pump and a first diversion valve 11, pumping a feed valve 15 of an increase flow pump and a feed valve 18 of a transfer pool, closing the other valves, starting the increase flow pump, pumping the waste water containing the sludge to the transfer pool through a feed pipe 6 of the feed delivery pump and the increase flow pump 7, and overflowing the clear liquid on the upper part of the transfer pool to the primary sedimentation pool. Because the blockage occurs in the collecting hopper and the feeding pipe of the conveying pump firstly, under the flow-increasing emptying mode, in the process of sucking away the sludge by the high-flow-increasing pump, the sludge in the inlet pipe of the conveying pump 5 can be taken away, and the feeding pipe of the conveying pump is emptied while the collecting hopper is emptied.

Thirdly, automatic backflushing mode water flow path:

opening the feed valve 12 of the flow increasing pump, opening the feed valve 15 of the flow increasing pump, opening the second diversion valve 19 and the discharge valve 21 of the delivery pump, opening the feed valve 10 of the delivery pump, closing other valves, starting the flow increasing pump 7, leading water to pass through the feed pipe 9 of the flow increasing pump and the negative pressure bag 8, boosting the pressure of the flow increasing pump, and then backflushing the inlet and outlet pipelines of the delivery pump through the feed valve 15 of the flow increasing pump, the second diversion valve 19, the discharge valve 21 of the delivery pump and the feed valve 10 of the delivery pump.

(3) Mixing tank and transfer tank

The outlet of the mixing tank is sequentially connected with a pressure filtration pump and a pressure filter, the liquid outlet of the pressure filter is connected with a primary sedimentation tank, the filtered liquid is discharged into the primary sedimentation tank, and the solid outlet is used for discharging sludge. A discharge port at the upper part of the transfer tank is connected with the primary reaction tank, and the clear liquid at the upper part overflows to the primary reaction tank; the transfer bottom of the pool is provided with a collecting hopper which is communicated with the mixing pool through a pipeline and a pump so as to discharge sludge at the bottom of the mixing pool.

(4) Second-stage reaction tank and second-stage sedimentation tank

The secondary reaction tank material inlet comprises a medicament material inlet, the overflow port is connected with a secondary sedimentation tank, clear liquid is discharged from the water outlet of the secondary sedimentation tank, and the sludge outlet at the bottom of the secondary sedimentation tank is connected with the mixing tank.

(5) PLC controller

The PLC is internally provided with a single chip microcomputer, a pH measuring electrode in the first-stage reaction tank is electrically connected with the input end of the single chip microcomputer, and the output end of the single chip microcomputer is connected with the neutralizer delivery pump, the first-stage tank delivery pump 5, the first-stage tank flow increasing pump 15 and all the valves.

In this embodiment, the bottom of the sedimentation tank is a rectangular flat bottom with a length of 40m and a width of 7.5 m. Water treatment flow rate 200m³The flow selected by the delivery pump is 25m³The delivery lift is 12 m. The flow rate of the flow increasing pump is 100m³The/h head is 50 m.

The process flow diagram of this example is shown in fig. 4, in this example, the first-stage tank is used for PH adjustment of wastewater, and the second-stage tank is used for flocculation and sedimentation. Taking acidic wastewater as an example, the acidic wastewater (the pH is less than 1, the source is wastewater produced by phthalocyanine blue acid dissolution method production process of Anhui Lanhua pigment Co., Ltd.) enters a first-stage reaction tank, and a calcium oxide solution is added into the first-stage reaction tank to adjust the pH value (the adjustment of the pH value is automatically controlled by PLC, namely a pH measuring electrode is arranged in the reaction tank, and the measured pH is converted into a signal to be transmitted to the first-stage reaction tankThe PLC controller, the system is according to the converter rotational speed of survey PH value automatic adjustment neutralizer (for example calcium oxide) delivery pump, then control the flow size of neutralizer solution, reach the purpose of adjustment PH value, final pH need be adjusted to 8.0 ~ 8.5, preferably 8.3), waste water overflow to the one-level sedimentation tank after the reaction, waste residue in the waste water deposits in the one-level sediment and becomes mud, the mud scraper on the pond comes and goes the operation, the scraper blade of mud scraper stretches into the bottom of the pool, scrape into the one-level pond collection hopper of pond end portion with the mud that deposits, mud in the one-level pond collection hopper is fought is carried the mixing tank by the one-level pond delivery pump again, filter in the filter press is gone into to the final filter press through the filter press pump of mixing tank. Flocculating agent (polyaluminium chloride and polyacrylamide are added into the secondary reaction tank, and the wastewater treatment flow is 200m³Calculated by the volume ratio of polyaluminium chloride to polyacrylamide is as follows: 75 kg/day and 50 kg/day) and the wastewater are evenly stirred to increase the sedimentation effect, then the produced flocculate is sedimentated in a secondary sedimentation tank, and then is conveyed to a mixing tank by a pump, is mixed with the sludge in a primary tank and then is pumped into a filter by a filter press pump to be filtered.

In order to ensure the continuous operation of the system, each sedimentation tank is respectively provided with two pumps with different grades, and the pump with lower power is used as a conventional material conveying pump, so that the balance of the treated water flow is ensured, and the later biochemical treated water flow is stabilized; the pump with larger power is used as flow increasing reinforcement and plays the roles of dredging a pipeline and emptying a collecting hopper, wherein the power of the conventional material conveying pump is 2.2-3 kw, and the power of the flow increasing pump is 18.5-30 kw, preferably 22 kw. The waste water of the flow increasing pump enters a transfer tank, and the supernatant overflows and returns to a primary sedimentation tank. The two pumps with different powers are used alternately, the suction force of the high-power pump is strong, residual deposited waste slag and sludge in the pipeline are sucked away, and the pipeline of the material conveying pump is ensured to be smooth. The valves on the pipelines are pneumatic valves, the pumps and the valves are controlled on a PLC, and a slurry conveying mode, a flow increasing emptying mode and a backflushing mode can be automatically switched.

In a conventional conveying mode state (namely, a conveying pump and related valves with smaller power are started), after the conveying pump operates for a period of time, when an inlet pipe of the conveying pump is blocked, the current of a motor connected with the conveying pump and the outlet flow are inevitably reduced, and when the current of the motor connected with the conveying pump is lower than a set value (generally, the current of the motor connected with the conveying pump is lower than 65% -80% of the normal working current, for example, 70%), the motor of the conveying pump transmits a current signal to a PLC (programmable logic controller) control system, and after the PLC control system receives the signal, the conveying pump automatically switches to a flow increasing emptying mode (namely, the conveying pump and the related valves are closed, a high-power flow increasing pump is started, and corresponding valves are opened), the flow increasing pump operates according. After the running time of the flow increasing pump reaches the set time (for example, 2-3 minutes, the running time can be adjusted and set according to the water quality), the PLC control system automatically switches the running mode to the conventional conveying mode. If the working current of the motor connected with the material conveying pump in the conventional conveying mode cannot reach a set value (65% -80% of the normal working current of the pump, such as 70%), the PLC controls the automatic stopping equipment and gives an alarm to remind, at the moment, the working personnel switch to the automatic backflushing mode on the PLC control system or perform related inspection and treatment, and the normal conveying mode is recovered to operate. The flow increasing pump is used for short-time auxiliary cleaning, does not need continuous operation, can be cleaned after being disassembled, and does not influence the normal operation of a continuous neutralization treatment system when the flow increasing pump and a pipeline are disassembled and cleaned. In addition, also can install flow sensor on the defeated material pump export (the mouth of pipe of keeping away from one-level sedimentation tank one end) pipeline of one-level pond, with PLC controller singlechip's input electric connection, monitor whether defeated material pump inlet pipe blocks up through the flow.

Technical contents of the recoil mode are as follows: the inlet pipeline of the flow increasing pump is provided with a main pipeline 6 and a bypass pipeline 9 which are inserted into the collecting hopper from the upper part of the sedimentation tank. And when the main pipeline is blocked, the main pipeline is subjected to back flushing dredging through the bypass pipeline. The bypass pipeline 9 realizes water inlet from the liquid pipeline by increasing the negative pressure bag 8. The lower layer of the negative pressure bag adopts a conical hopper design, which is beneficial to timely sucking away the sludge without blockage. The bypass pipeline is inserted into the aggregate bin from the upper part of the sedimentation tank, so that the height of the bypass pipeline is convenient to adjust, and the bypass pipeline is convenient to disassemble and overhaul.

When backflushing, the material conveying pump is closed, the flow increasing pump is started, water flow enters the flow increasing pump from the bypass water inlet pipe 9, is pressurized by the flow increasing pump, and then flows backwards from the outlet pipe of the flow increasing pump to enter the material conveying pump, backflushing is carried out on the inlet and outlet pipelines of the material conveying pump, and mud deposited in the pipelines is flushed out of the pipelines. And then manually closing the backflushing mode, starting the automatic flow-increasing emptying mode, and pumping flushed sludge into the transfer pool. Then switching to the starting of the conventional conveying mode to enter an automatic running state.

Example 2

In example 2, a pipeline schematic diagram of a primary sedimentation tank is shown in fig. 5, and the differences from example 1 are as follows: a third diversion valve 13 is arranged on the first diversion pipeline between the first diversion valve 11 and the inlet of the flow increasing pump 7, one end, far away from the flow increasing pump 7, of the third diversion valve 13 is communicated with one end, far away from the flow increasing pump, of the flow increasing pump discharge valve 15 through the third diversion pipeline, a fourth diversion valve 14 is arranged at one end, close to the valve 13, of the third diversion pipeline, and a fifth diversion valve 16 is arranged at one end, close to the valve 15, of the third diversion pipeline.

In the backflushing mode described in embodiment 1, when the inlet and outlet of the material delivery pump 5 are blocked seriously and cannot operate, the material inlet valve 12 of the flow-increasing pump can be opened manually, the material outlet valve 15 of the flow-increasing pump is opened, the fifth diversion valve 16, the fourth diversion valve 14, the first diversion valve 11 and the material delivery pump material inlet valve 10 are opened, other valves are closed, so that water flows through the material inlet pipe 9 of the flow-increasing pump, the negative pressure bag 8 and the flow-increasing pump to be pressurized, and then flows through the material inlet valve 15 of the flow-increasing pump, the fifth diversion valve 16, the fourth diversion valve 14, the first diversion valve 11 and the material delivery pump material inlet valve 10 to perform backflushing on the material delivery pump material inlet pipeline at the material delivery pump inlet independently, and the automatic backflushing mode is started after dredging, so as. If the alarm signal is received, the excess sludge in the aggregate hopper is detected, the valve can be manually switched, and the sludge in the aggregate is directly discharged to the transfer tank.

Example 3

The process flow chart of example 3 is shown in fig. 6, and the pipeline schematic diagram of example 3 and the settling tank is shown in fig. 7, and it can be seen that the differences between example 3 and example 2 are: the structure and the pipeline of second grade sedimentation tank are the same with one-level sedimentation tank, and second grade sedimentation tank bottom is provided with second grade pond collecting hopper, and second grade pond collecting hopper has second grade pond increasing flow pump and second grade pond conveying pump through second grade pond increasing flow pump inlet pipe and second grade pond conveying pump inlet pipe intercommunication respectively, and the pipeline between fourth guiding valve 14 and the fifth guiding valve 16 of one-level sedimentation tank corresponds the pipeline intercommunication with the second grade sedimentation tank, is provided with sixth guiding valve 17 on the connecting tube. The outlet pipes of the high-power flow-increasing pumps of the primary sedimentation tank and the secondary sedimentation tank are communicated, and the PLC controllers can be manually switched through valves to be mutually backflushed to be used as one of the alternative pipelines.

Example 4

The difference between example 4 and example 3 is: install mobilizable dive agitating unit 3 on the mud equipment of scraping of one-level sedimentation tank, utilize the characteristics that make a round trip to come and go of mud scraper, through the height and the left and right sides position that change adjustment agitating unit, thoroughly clear away the bottom of the pool scale deposit comprehensively and pile up, play the enhancement raising the function to mud scraper.

The front view of the submersible stirring device is shown in fig. 8, and the side view of the submersible stirring device is shown in fig. 9. The concrete structure of this dive agitating unit is: a mud scraper frame platform 2-5 is arranged at the top of the sedimentation tank 1, a mud scraper lifting motor 2-3 is arranged on the mud scraper frame platform, the lifting motor is connected with a mud scraper lower scraper 2-1 through a mud scraper lifting steel wire rope 2-4, four mud scraper travelling wheels 2-2 are arranged between the mud scraper frame platform and the sedimentation tank wall 1-2, the mud scraper travelling wheels drive the mud scraper to run back and forth on the surface of the sedimentation tank, and the mud scraper lifting motor 2-3 drives the mud scraper lower scraper to run (the scraper is movable, is placed down when going in the direction of the collecting hopper, and is lifted up by the lifting motor when going back); a stirring moving frame 3-6 is arranged on a mud scraper rack platform, a stirring moving frame driving motor 3-7 is arranged on the stirring moving frame 3-6, a slide rail is arranged on the mud scraper rack platform, stirring moving frame walking wheels 3-1 are arranged at the bottom of the stirring moving frame 3-6, the stirring moving frame walking wheels 3-1 are driven by the stirring moving frame driving motor 3-7 to move left and right along the slide rail on the mud scraper rack platform in parallel, an adjusting disc support frame 3-5 is arranged at one end of the stirring moving frame, an adjusting disc 3-4 is arranged at the top end of the adjusting disc support frame, an adjusting lever 3-3 is arranged in the middle of the adjusting disc 3-4, the adjusting disc and the adjusting lever are connected in a thread mode, the adjusting lever can ascend or descend by rotating the adjusting disc, and a stirring main frame 3-2 is connected at the bottom of the, the stirring main frame 3-2 extends into the bottom of the primary sedimentation tank, and the bottom end of the stirring main frame 3-2 is provided with a stirring paddle. Through rotating the adjusting disk, can carry out upper and lower position adjustment to stirring body frame and stirring rake.

When the accumulated materials in the collecting hopper are too much or the mud scraper stops abnormally and is not found in time, a large amount of sludge is deposited at the bottom of the pool, and the submersible stirring device is started when the mud scraper cannot scrape away. The mud scraper is driven to travel back and forth by the mud scraper travelling wheel to drive the submersible stirring device 3 to travel back and forth, the height position of the stirring main frame 3-2 is changed by manually rotating the adjusting disc 3-4, the submersible stirring moving frame travelling wheel 3-1 is driven by the stirring moving frame driving motor 3-7 to move along the left and right side directions, the limit switches are arranged at the tail ends of the two sides, the motor phase is changed after the stirring moving frame 3-6 moves to the end to touch the limit switches, the motor rotates reversely and reverses to move towards the other direction, the moving direction is changed again when the stirring moving frame moves to the other end, and the operation is circulated left and right. Finally, the positions of the tank bottom are changed from front to back, left to right, up to down, and the tank bottom can be scattered point by point in an all-around manner, the scattered sludge is scraped into a collecting hopper, then the sludge is pumped into a mixing tank or a transfer tank by a delivery pump, solid-liquid separation is carried out by filtering of a filter, and the non-blocking continuous operation of a neutralization treatment system is ensured, so that the purposes of no need of stopping for drainage and cleaning of the sludge at the tank bottom are achieved.

In conclusion, the acid-base wastewater neutralization treatment system can timely and quickly solve various blockage problems from multiple aspects, automatically prevents insects under the condition of no stop, effectively prolongs the continuous operation time of the neutralization treatment system, and achieves the purposes of increasing efficiency and reducing cost.

Claims

1. The system for neutralizing and treating the acid and alkali wastewater is characterized by comprising a primary reaction tank, a primary sedimentation tank (1), a secondary reaction tank and a secondary sedimentation tank which are sequentially communicated, a primary tank material conveying pump (5) and a primary tank flow increasing pump (7) which are communicated with the primary sedimentation tank, a mixing tank and a transit tank;

the feeding port of the first-stage reaction tank comprises an acid-base wastewater feeding port and a neutralizing agent feeding port; the device is characterized in that a first-level pond mud scraper (2) is arranged at the top of a first-level sedimentation tank (1), a lower mud scraper (2-1) is arranged at the bottom of the mud scraper, a first-level pond collection hopper (4) with an inverted cone shape is arranged at the bottom of the first-level sedimentation tank (1), a first-level pond delivery pump inlet pipe (6) is arranged inside the first-level pond collection hopper and is communicated with the first-level pond delivery pump (5), a first-level pond flow increasing pump inlet pipe (9) is arranged inside the collection hopper (4) and is communicated with the first-level pond flow increasing pump (7), the first-level pond flow increasing pump inlet pipe (9) is inserted from the liquid of the first-level sedimentation tank, the vertical height from the first-level pond flow increasing pump inlet pipe (9) to the bottom of the collection hopper is greater than that from the first-level pond delivery pump inlet pipe (6) to the bottom of the collection hopper, a flow increasing pump negative pressure bag (, an outlet of the first-stage tank material conveying pump (5) is connected with an inlet of the mixing tank, an outlet of the first-stage tank pump-increasing pump (7) is connected with an inlet of the transfer tank, one end, close to the first-stage sedimentation tank, of the first-stage tank material conveying pump (5) is connected with one end, close to the first-stage sedimentation tank, of the first-stage tank pump-increasing pump (7) through a first flow guide pipeline, a first flow guide valve (11) is arranged on the first flow guide pipeline, one end, far away from the first-stage sedimentation tank, of the first-stage tank material conveying pump (5) is connected with one end, far away from the first-stage sedimentation tank, of the first-stage tank pump-increasing pump (7) through a second flow;

2. The system for neutralizing and treating the acid-base wastewater according to claim 1, wherein an inlet and an outlet of the primary tank pump (5) are respectively provided with a primary tank pump feed valve (10) and a primary tank pump discharge valve (21), an inlet and an outlet of the primary tank pump (7) are respectively provided with a primary tank pump feed valve (12) and a primary tank pump discharge valve (15), an inlet of the mixing tank is provided with a mixing tank feed valve (20), an inlet of the transfer tank is provided with a transfer tank feed valve (18), and an end of the primary tank pump discharge valve (21) far away from the primary tank pump is communicated with an end of the primary tank pump discharge valve (15) far away from the primary tank pump through a second diversion pipeline.

3. The acid-base wastewater neutralization treatment system according to claim 1 or 2, wherein the power of the primary tank pump (7) is 6-10 times of the power of the primary tank pump (5).

4. The acid-base wastewater neutralization treatment system according to any one of claims 1 to 3, wherein the neutralization treatment system further comprises a PLC controller, and a single chip microcomputer is installed in the PLC controller; a pH measuring electrode is arranged in the primary reaction tank, and a neutralizer feeding port is connected with a neutralizer delivery pump; the pH measuring electrode is electrically connected with the input end of a single chip microcomputer, and the output end of the single chip microcomputer is electrically connected with the neutralizer delivery pump, the first-stage pool delivery pump (5), the first-stage pool booster pump (15), the first diversion valve (11) and the second diversion valve (19).

5. The acid-base wastewater neutralization treatment system according to any one of claims 2 to 4, wherein a third diversion valve (13) is installed on the first diversion pipeline between the first diversion valve (11) and the inlet of the primary pool pump-up pump (7), one end of the third diversion valve (13) far away from the primary pool pump-up pump (7) is communicated with one end of the primary pool pump-up pump discharge valve (15) far away from the primary pool pump-up pump through a third diversion pipeline, a fourth diversion valve (14) is arranged on one end of the third diversion pipeline close to the third diversion valve (13), and a fifth diversion valve (16) is arranged on one end of the third diversion pipeline close to the primary pool pump-up pump discharge valve (15).

6. The acid-base wastewater neutralization treatment system according to any one of claims 1 to 5, wherein a mud scraper frame platform (2-5) is installed on the top of the primary sedimentation tank, a mud scraper lifting motor (2-3) is installed on the mud scraper frame platform, the lifting motor is connected with a lower scraper (2-1) of the mud scraper through a mud scraper lifting steel wire rope (2-4), and a mud scraper travelling wheel (2-2) is arranged between the mud scraper frame platform and the sedimentation tank wall (1-2).

7. The acid-base wastewater neutralization treatment system according to claim 6, wherein the mud scraper rack platform (2-5) is provided with a stirring moving rack (3-6), the stirring moving rack (3-6) is provided with a stirring moving rack driving motor (3-7), the bottom of the stirring moving rack is provided with a stirring moving rack traveling wheel (3-1), the mud scraper rack platform (2-5) is provided with a sliding rail at a position corresponding to the stirring moving rack traveling wheel (3-1), and the mud scraper traveling wheel (2-2) is perpendicular to a traveling track of the stirring moving rack traveling wheel (3-1); one end of the stirring moving frame (3-6) is provided with an adjusting disc support frame (3-5), the adjusting disc (3-4) is installed at the top end of the adjusting disc support frame, an adjusting rod (3-3) is installed in the middle of the adjusting disc (3-4), the adjusting disc is connected with the adjusting rod in a thread mode, the stirring main frame (3-2) is connected to the bottom of the adjusting rod (3-3), the stirring main frame (3-2) extends into the bottom of the primary sedimentation tank, and the bottom of the stirring main frame (3-2) is connected with a stirring paddle.

8. The system for neutralizing and treating acidic and alkaline wastewater according to any one of claims 1 to 7, wherein the structure and the connecting pipelines of the secondary sedimentation tank are the same as those of the primary sedimentation tank, a secondary tank collecting port is arranged at the bottom of the secondary sedimentation tank, the secondary tank collecting hopper is communicated with a secondary tank flow-increasing pump and a secondary tank material-conveying pump through a secondary tank flow-increasing pump feeding pipe and a secondary tank material-conveying pump feeding pipe respectively, and the outlet of the primary tank flow-increasing pump is communicated with the outlet of the secondary tank flow-increasing pump.

9. The method for neutralizing the acid-base wastewater is characterized by comprising the following steps of:

opening the acid-base wastewater neutralization treatment system according to any one of claims 1 to 8, introducing the wastewater into a primary reaction tank, adding a neutralizing agent into a neutralizing agent inlet, reacting with the wastewater, overflowing into a primary sedimentation tank, precipitating, then overflowing a supernatant into a secondary reaction tank, adding a flocculating agent into a medicament inlet, mixing, reacting, overflowing the supernatant into a secondary sedimentation tank, precipitating, and discharging the supernatant; the mud scraper scrapes the sediment slurry in the primary sedimentation tank into the primary tank aggregate bin, and any one of the following conveying modes is carried out:

10. The neutralization method according to claim 9, wherein the inlet and the outlet of the primary tank feed pump (5) are respectively provided with a primary tank feed pump feed valve (10) and a primary tank feed pump discharge valve (21), the inlet and the outlet of the primary tank pump (7) are respectively provided with a primary tank flow-increasing pump feed valve (12) and a primary tank flow-increasing pump discharge valve (15), the inlet of the mixing tank is provided with a mixing tank feed valve (20), the inlet of the transfer tank is provided with a transfer tank feed valve (18), and one end of the primary tank feed pump discharge valve (21) far away from the primary tank feed pump is communicated with one end of the primary tank flow-increasing pump discharge valve (15) far away from the primary tank pump through a second diversion pipeline;

(1) and (3) a conventional conveying mode: opening a feeding valve (10) of a first-stage tank material conveying pump, opening a discharging valve (21) of the first-stage tank material conveying pump and a feeding valve (20) of a mixing tank, closing the other valves, starting the first-stage tank material conveying pump to operate, and pumping the slurry into the mixing tank through a material conveying pump feeding pipe (6) and a first-stage tank material conveying pump (5) through the discharging valve (21) of the first-stage tank material conveying pump and the feeding valve (20) of the mixing tank, and finally pumping the slurry into a filter press through a filter press pump of the mixing tank;

(2) flow increasing emptying mode: opening a feeding valve (10) and a first diversion valve (11) of a first-stage pool material conveying pump, opening a feeding valve (15) and a transfer pool feeding valve (18) of a first-stage pool flow-increasing pump, closing the other valves, starting the flow-increasing pump, pumping the slurry to the transfer pool through a feeding pipe (6) of the first-stage pool material conveying pump and a first-stage pool flow-increasing pump (7), and overflowing the clear liquid on the upper part of the transfer pool to the first-stage reaction pool;

(3) automatic recoil mode: opening a first-stage pond flow increasing pump feed valve (12), opening a first-stage pond flow increasing pump feed valve (15), a second diversion valve (19), a first-stage pond feed pump discharge valve (21) and a first-stage pond feed pump feed valve (10), closing other valves, starting a first-stage pond flow increasing pump (7), enabling water to flow through a first-stage pond flow increasing pump feed pipe (9), a negative pressure bag (8), after the flow increasing pump is pressurized, back through the first-stage pond flow increasing pump feed valve (15), the second diversion valve (19), the first-stage pond feed pump discharge valve (21) and the first-stage pond feed pump feed valve (10), and backflushing an inlet and outlet pipeline of a feed pump.

11. The neutralization method according to claim 9 or 10, wherein a third diversion valve (13) is arranged on the first diversion pipeline between the first diversion valve (11) and the inlet of the primary pool pump-up pump (7), one end of the third diversion valve (13) far away from the primary pool pump-up pump (7) is communicated with one end of the primary pool pump-up pump discharge valve (15) far away from the primary pool pump-up pump through the third diversion pipeline, a fourth diversion valve (14) is arranged on one end of the third diversion pipeline close to the third diversion valve (13), and a fifth diversion valve (16) is arranged on one end of the third diversion pipeline close to the primary pool pump-up pump discharge valve (15);

when sludge deposits at the inlet and the outlet of a material delivery pump of the first-level tank, a manual backflushing mode is started: opening a first-stage pond flow-increasing pump feed valve (12), opening a first-stage pond flow-increasing pump feed valve (15), a fifth diversion valve (16), a fourth diversion valve (14), a first diversion valve (11) and a first-stage pond feed pump feed valve (10), closing other valves, enabling water to flow through a first-stage pond flow-increasing pump feed pipe (9) and a negative pressure bag (8), and after being pressurized by the flow-increasing pump, sequentially passing through the first-stage pond flow-increasing pump feed valve (15), the fifth diversion valve (16), the fourth diversion valve (14), the first diversion valve (11) and the first-stage pond feed pump feed valve (10), and independently performing backflushing on a pipeline at the inlet of the first-stage pond feed pump.

12. The neutralization method according to any one of claims 9 to 11, wherein a mud scraper frame platform (2-5) is installed on the top of the primary sedimentation tank, a mud scraper lifting motor (2-3) is installed on the mud scraper frame platform, the lifting motor is connected with a lower scraper blade (2-1) of the mud scraper through a mud scraper lifting steel wire rope (2-4), and a mud scraper travelling wheel (2-2) is arranged between the mud scraper frame platform and the sedimentation tank wall (1-2);

after the materials in the first-level sedimentation tank are precipitated, the travelling wheels of the mud scraper drive the mud scraper to move back and forth on the surface of the sedimentation tank, and a lifting motor (2-3) of the mud scraper drives a lower scraper of the mud scraper to move through a lifting steel wire rope (2-4) to scrape the precipitates into a collecting hopper.

13. The neutralization method according to claim 12, wherein the mud scraper rack platform (2-5) is provided with an agitation moving rack (3-6), the agitation moving rack (3-6) is provided with an agitation moving rack driving motor (3-7), the bottom of the agitation moving rack is provided with an agitation moving rack traveling wheel (3-1), the mud scraper rack platform (2-5) is provided with a sliding rail at a position corresponding to the agitation moving rack traveling wheel (3-1), and the mud scraper traveling wheel (2-2) is perpendicular to a traveling track of the agitation moving rack traveling wheel (3-1); an adjusting disc support frame (3-5) is arranged at one end of the stirring moving frame (3-6), an adjusting disc (3-4) is arranged at the top end of the adjusting disc support frame, an adjusting rod (3-3) is arranged in the middle of the adjusting disc (3-4), the adjusting disc is connected with the adjusting rod in a thread mode, a stirring main frame (3-2) is connected to the bottom of the adjusting rod (3-3), the stirring main frame (3-2) extends into the bottom of the primary sedimentation tank, and a stirring paddle is connected to the bottom end of the stirring main frame (3-2);

when the sludge in the primary sedimentation tank is excessive, the sludge scraper moves back and forth on the surface of the sedimentation tank, the movable frame (3-6) moves left and right under the driving of the movable frame driving motor (3-7), and the adjusting disc (3-4) is rotated at the same time, so that the height position of the stirring main frame (3-2) is changed, the sludge at the bottom of the primary sedimentation tank is scattered and scraped into the collecting hopper.

14. The neutralization method according to any one of claims 9 to 13, wherein the structure and the connecting pipelines of the secondary sedimentation tank are the same as those of the primary sedimentation tank, a secondary tank collecting port is arranged at the bottom of the secondary sedimentation tank, the secondary tank collecting hopper is communicated with a secondary tank flow increasing pump and a secondary tank delivery pump through a secondary tank flow increasing pump feeding pipe and a secondary tank delivery pump feeding pipe respectively, and a primary tank flow increasing pump outlet is communicated with a secondary tank flow increasing pump outlet;