CN216336790U - Coagulation equipment matched with dense medium flocculation process - Google Patents
Coagulation equipment matched with dense medium flocculation process Download PDFInfo
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- CN216336790U CN216336790U CN202122964817.9U CN202122964817U CN216336790U CN 216336790 U CN216336790 U CN 216336790U CN 202122964817 U CN202122964817 U CN 202122964817U CN 216336790 U CN216336790 U CN 216336790U
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Abstract
A coagulation device matched with a dense medium flocculation process comprises a coagulation tank, a U-shaped communicating pipe, a flocculation tank, a guide cylinder, a backflow water pump and a compressed air system; one side of the coagulation tank is communicated with the water distribution area, and the bottom of the coagulation tank is connected with the flocculation tank through a U-shaped communicating pipe; the coagulation tank is provided with a coagulation tank stirrer, the flocculation tank is internally provided with a flocculation tank stirrer and a guide cylinder, and the lower part of the flocculation tank stirrer is arranged in the guide cylinder; an outlet at the bottom end of the flocculation tank is communicated with a water distribution area or a U-shaped communicating pipe through a return water pump; the compressed air system is communicated with the coagulation tank, the flocculation tank and the U-shaped communicating pipe. The utility model can effectively reduce the pollution and blockage of the heavy medium particles to equipment, greatly improve the utilization efficiency of the heavy medium particles and increase the suspension concentration of the heavy medium particles in the reactor. Thereby improving the maximum treatment capacity of the equipment, ensuring the quality of the effluent water and strengthening the anti-fluctuation capability of the system under the conditions of inflow water fluctuation and frequent start and stop.
Description
Technical Field
The utility model belongs to the field of water treatment, and particularly relates to coagulation equipment matched with a dense medium flocculation process.
Background
The mine drainage water and the circulating water sewage are typical high-hardness wastewater, and have a great recycling value after treatment. Hardness and most suspended matters in raw water are usually removed by a softening-coagulating clarification process, and then the raw water enters a membrane treatment process for advanced treatment. Generally, the total hardness of mine drainage water and circulating water blowdown water is high, the magnesium hardness accounts for a high proportion of the total hardness, and magnesium hydroxide formed after softening of the agent is floccules or flakes, large in volume, light in specific gravity and difficult to settle. The effluent quality is generally stabilized by increasing the PAM adding amount and reducing the ascending flow velocity, but the medicament cost and the construction cost of structures are increased, and the irreversible pollution and blockage risks are caused to an ultrafiltration system and a reverse osmosis system by excessive PAM adding. Aiming at the characteristics of magnesium hydroxide sludge, magnetic particles or powder with higher specific gravity can be added into a clarification tank by utilizing a dense medium magnetic flocculation process, and the settling velocity of the sludge is improved by utilizing the downward dragging effect of the dense medium on the sludge after the heavy medium is wrapped by sludge flocs, so that the ascending flow velocity of equipment is improved, and the treated water quantity is increased.
In practical application, heavy medium particles are generally added directly to the conventional clarification process equipment so as to achieve a better treatment effect. However, as the specific gravity of the heavy medium particles is large and the sedimentation speed is high, during operation, most of the sludge wrapping the heavy medium particles is found to be deposited at the corners of the bottom of the flocculation tank and at the bottom of the U-shaped communicating pipe between the flocculation tank and the flocculation tank, the suspended state is still difficult to recover under the action of stirring and water flow, the density of the heavy medium particles effectively suspended in the reaction zone is greatly reduced in a short time, and the reaction zone can maintain the sufficient concentration of the heavy medium particles by frequently supplementing the heavy medium particles. The operation mode causes overlarge consumption of heavy medium particles, and a large amount of heavy medium particles are deposited at the bottom of the flocculation tank, so that the clarification tank is polluted and blocked in a short period; and a large amount of heavy medium particles cause abnormal abrasion of rotating equipment and pipelines, and the maintenance cost of the system is high. On the other hand, the system often has great water yield fluctuation in the actual operation process, and when the system water yield is lower or the system is restarted after being stopped, the stirring effect of the water flow in the clarification tank is weakened or stopped, the deposition of dense medium particles can be accelerated, the above-mentioned dirty blocking phenomenon is aggravated, and the operation requirement under the real working condition is difficult to meet in practice.
At present, a coagulation device needs to be optimized according to the physical characteristics of heavy medium particles such as high specific gravity, easy deposition and magnetism, and a coagulation device with the heavy medium difficult to deposit and block is developed, so that the device is suitable for the operation conditions of high water fluctuation and frequent start and stop under the heavy medium adding condition.
SUMMERY OF THE UTILITY MODEL
Aiming at a softening and clarifying device for softening and clarifying high-hardness wastewater such as mine drainage water, circulating water drainage water and the like, the utility model aims to provide coagulation equipment matched with a heavy medium flocculation process, which aims to effectively relieve the problems of low density of effective suspended heavy medium particles, pollution blockage of the device, difficulty in adapting to water fluctuation and the like. The utility model can slow down the deposition of heavy medium particles in the equipment.
In order to achieve the purpose, the utility model adopts the following technical scheme:
a coagulation device matched with a dense medium flocculation process comprises a coagulation tank, a U-shaped communicating pipe, a flocculation tank, a guide cylinder, a backflow water pump and a compressed air system; one side of the coagulation tank is communicated with the water distribution area, and the bottom of the coagulation tank is connected with the flocculation tank through a U-shaped communicating pipe; the coagulation tank is provided with a coagulation tank stirrer, the flocculation tank is internally provided with a flocculation tank stirrer and a guide cylinder, and the lower part of the flocculation tank stirrer is arranged in the guide cylinder; an outlet at the bottom end of the flocculation tank is communicated with a water distribution area or a U-shaped communicating pipe through a return water pump; the compressed air system is communicated with the coagulation tank, the flocculation tank and the U-shaped communicating pipe.
Furthermore, a water passing hole is formed in the side wall of the flocculation tank.
Further, an on-line pH meter is arranged in the flocculation tank.
Furthermore, a propelling paddle blade is adopted by the flocculation tank stirrer.
Furthermore, the water distribution area is connected with a water inlet pipeline, and a water inlet flowmeter is arranged on the water inlet pipeline.
Further, the outlet of the return water pump is communicated with the water distribution area or the U-shaped communicating pipe through a pipeline; the pipeline is provided with a reflux flowmeter.
Further, the compressed air system includes the compressed air storage tank and with the compressed air pipeline, and the compressed air pipeline entry links to each other with the compressed air storage tank, and the export divide into three routes, stretches into the flocculation basin bottom along the flocculation basin lateral wall all the way, and another way stretches into the flocculation basin bottom along the flocculation basin lateral wall, and the third route is linked together with U type communicating pipe.
Furthermore, a plurality of spray heads are arranged on the compressed air pipeline extending into the bottom of the coagulation tank and the compressed air pipeline extending into the bottom of the flocculation tank.
Compared with the prior art, the utility model has the beneficial effects that:
according to the utility model, through the backflow water pump, when the water inflow amount is insufficient or the fluctuation is large, the backflow water amount can be actively adjusted through the backflow water pump, the overflowing flow in the coagulation tank and the flocculation tank is kept stable, the deposition of heavy medium particles and sludge can be effectively inhibited, and the contact effect of the heavy medium particles and the mixed liquid is ensured. Meanwhile, the water discharged by the reflux water pump can be used as the flushing water of the U-shaped communicating pipe, so that the deposition and blockage of dense medium particles in the equipment are not easy to occur.
Furthermore, the flocculation tank stirrer adopts a propelling stirring paddle with adjustable rotation direction, and the water flow of the coagulation tank and the flocculation tank can be increased through a backflow water pump during daily operation, so that excessive sludge containing heavy medium particles is prevented from being deposited. When the sludge containing heavy medium particles at the bottom of the flocculation tank is excessively deposited or equipment is started, water flow in the guide cylinder is pushed downwards by changing the rotation direction of a flocculation tank stirrer and increasing the rotation speed, the downward water flow and the upward water flow are converged at the bottom of the flocculation tank and then flow to the peripheral side wall of the guide cylinder, a scouring effect is generated on the side wall of the guide cylinder, and the deposited heavy medium particles are swept back into the flocculation tank again; meanwhile, compressed air is used for purging key parts, so that the sludge containing heavy medium particles is recovered to be in a suspension state. Meanwhile, the push flow area turning wall is cancelled, so that the sedimentation of heavy medium particles at the lower part of the original turning wall is avoided. The dense medium particles in the flocculation tank are uniformly distributed and are not easy to deposit.
Furthermore, a compressed air system is arranged, a compressed air pipeline is arranged along an area where sedimentation easily occurs in the flocculation tank and is connected with the U-shaped communicating pipe, and the position where sedimentation easily occurs is blown and swept when necessary, so that equipment blockage is prevented.
Drawings
FIG. 1 is a system diagram of a coagulation device matched with a dense medium flocculation process;
in the figure, 1-a coagulation tank, 2-a coagulation tank stirrer, 3-U-shaped communicating pipes, 4-a flocculation tank, 5-a flocculation tank stirrer, 6-a guide cylinder, 7-a water passing hole, 8-a reflux water pump, 9-a compressed air system, 10-a compressed air pipeline, 11-a water inlet flow meter and 12-a reflux flow meter.
Detailed Description
The coagulation equipment matched with the dense medium flocculation process is further described in detail below by combining the attached drawings.
Referring to fig. 1, a coagulation device supporting a dense medium flocculation process comprises a coagulation tank 1, a coagulation tank stirrer 2, a U-shaped communicating pipe 3, a flocculation tank 4, a flocculation tank stirrer 5, a guide cylinder 6, a water passing hole 7, a reflux water pump 8, a compressed air system 9, a compressed air pipeline 10, a water inlet flow meter 11 and a reflux flow meter 12. Wherein, one side of the coagulation tank 1 is provided with a water distribution area, the coagulation tank 1 is communicated with the water distribution area, the water distribution area is provided with a water inlet pipeline, and the water inlet pipeline is provided with a water inlet flow meter 11. The bottom of the coagulation tank 1 is connected with a flocculation tank 4 through a U-shaped communicating pipe 3; a water passing hole 7 is formed in the side wall of the bottom of the flocculation tank 4 and is connected with a subsequent sedimentation tank through the water passing hole 7; a coagulation tank stirrer 2 is installed inside the coagulation tank 1; the flocculation tank stirrer 5 is arranged inside the flocculation tank 4; the guide shell 6 is arranged in the center of the inside of the flocculation tank 4; and the bottom of the flocculation tank stirrer 5 is positioned in the guide shell 6. An outlet at the bottom end of the flocculation tank 4 is connected with an inlet of a return water pump 8 through a pipeline, and an outlet of the return water pump 8 is communicated with a water distribution area or a U-shaped communicating pipe 3 through a pipeline; a reflux flowmeter 12 is arranged on the pipeline.
The compressed air system 9 consists of a compressed air storage tank and a compressed air pipeline 10; the inlet of the compressed air pipeline 10 is connected with the compressed air storage tank, the outlet is divided into three paths, one path extends into the bottom of the coagulation tank 1 along the side wall of the coagulation tank 1, the other path extends into the bottom of the flocculation tank 4 along the side wall of the flocculation tank 4, the third path is communicated with the U-shaped communicating pipe 3, and the easy deposition part is blown and swept to prevent deposition when necessary. The compressed air storage tank is provided with a compressed air valve.
The flocculation tank 4 is provided with an online pH meter which is connected with the dosage of the softening agent, and the dosage is automatically adjusted on the basis of the given dosage to maintain the pH value of the mixed liquid in the flocculation tank to be close to the given pH value.
The flocculation tank stirrer 5 adopts a propelling paddle, the flocculation tank stirrer 5 adopts a variable frequency design, and the rotating speed of the stirrer is determined by the sum of the backflow flow and the inflow flow. 5 direction of rotation of flocculation basin agitator is adjustable, when equipment starts or takes place slight dense medium granule siltation, 5 reversals in the flocculation basin agitator, impels rivers downwards in the draft tube 6, and decurrent rivers and ascending rivers converge to the peripheral lateral wall of draft tube 6 after the flocculation basin bottom flow, produce the scouring action to 6 lateral walls of draft tube, purge the dense medium granule of siltation again back to the flocculation basin in, avoid containing the mud of dense medium granule to take place the siltation in the part. Meanwhile, a thrust zone is cancelled, so that the sedimentation of heavy medium particles at the lower part of the original water-turning wall is avoided; the measures are favorable for preventing the heavy medium particles from silting up inside the equipment.
8 exports of backwash pump and is connected with U type communicating pipe 3, and through switching the valve control pump behind 8 exports of backwash pump and export the flow direction, with rivers direction U type communicating pipe 3, realize the washing to U type communicating pipe 3, prevent to take place to block up communicating pipe.
Carry the mixed liquid backward flow in the flocculation basin 4 to the flocculation basin 1 in, when the inflow is less than design flow or appointed flow value, increase the circulation water yield between flocculation basin and flocculation basin through return water pump 8, be aided with the cooperation of flocculation basin agitator 2 and flocculation basin agitator 5, improve the scouring action of rivers, the mixed effect of reinforcing dense medium and medicament prevents the deposit of dense medium granule.
The working process of the coagulation equipment matched with the dense medium flocculation process comprises the following steps:
1) the system starts the preface after accomplishing for the first time after stopping, uses compressed air to sweep flocculation basin bottom and lateral wall border immediately, opens flocculation basin agitator 5 simultaneously to set up the reversal of flocculation basin agitator 5, make flocculation basin agitator 5 impel rivers to flocculation basin 4 bottoms, decurrent rivers and ascending rivers converge the back in flocculation basin 4 bottoms and flow to the peripheral lateral wall of draft tube 6, produce the scouring action to the lateral wall of draft tube 6. The heavy medium particles deposited at the bottom of the tank are returned to the suspension state by the measures. The step lasts for about 5 minutes, the rotating direction of the flocculation tank stirrer 5 is recovered after the step is finished, and the corresponding compressed air valve is closed.
2) Switching return water pump 8 goes out water to U type communicating pipe 3, uses compressed air to carry out air purge to U type communicating pipe 3 simultaneously, sweeps the deposit to rivers through the air current effect in, takes away the deposit through the rivers effect. The step lasts for about 5 minutes, the corresponding compressed air valve is closed after the step is finished, and the water outlet of the reflux water pump 8 is switched to a water distribution area at the front end of the condensation pool.
3) The equipment enters a stable operation working condition, wherein the output of the reflux water pump 8 is interlocked with the inflow, so that a sufficient water flow effect is ensured between a coagulation pond and a flocculation pond, and the heavy medium particles are kept in a suspension state; the coagulation tank stirrer 2 and the flocculation tank stirrer 5 are operated in linkage with the sum of the water inlet flow and the reflux flow; the output of coagulant and softening agent feeding device is linked with the water inlet flow.
4) After the system continuously operates, the mixed liquid of the flocculation tank 4 with a certain volume is taken at intervals for screening, the screened solid impurities are washed by clean water, pure dense medium particles are obtained by separation, the mass of the dense medium particles is measured after drying, the index change condition is recorded, the anti-silting operation is timely carried out on the bottom of the flocculation tank 4 and the U-shaped communicating pipe 3, and the operation method is the same as that of the step 1) and the step 2).
The utility model can effectively reduce the pollution and blockage of the heavy medium particles to equipment, greatly improve the utilization efficiency of the heavy medium particles and increase the suspension concentration of the heavy medium particles in the reactor. And further, the maximum treatment capacity of the equipment is improved, the water quality of the discharged water is ensured, the fluctuation resistance of the system under the conditions of the fluctuation of the water quantity of the incoming water and the frequent start-stop working condition is enhanced, and the economic benefit is good.
Claims (8)
1. The coagulation equipment matched with the dense medium flocculation process is characterized by comprising a coagulation tank (1), a U-shaped communicating pipe (3), a flocculation tank (4), a guide cylinder (6), a backflow water pump (8) and a compressed air system (9); wherein one side of the coagulation tank (1) is communicated with the water distribution area, and the bottom of the coagulation tank (1) is connected with the flocculation tank (4) through a U-shaped communicating pipe (3); the coagulation tank (1) is provided with a coagulation tank stirrer (2), the flocculation tank (4) is internally provided with a flocculation tank stirrer (5) and a guide cylinder (6), and the lower part of the flocculation tank stirrer (5) is arranged in the guide cylinder (6); an outlet at the bottom end of the flocculation tank (4) is communicated with the water distribution area or the U-shaped communicating pipe (3) through a reflux water pump (8); the compressed air system (9) is communicated with the coagulation tank (1), the flocculation tank (4) and the U-shaped communicating pipe (3).
2. The coagulation equipment matched with the dense medium flocculation process of claim 1, wherein a water passing hole (7) is formed in the side wall of the flocculation tank (4).
3. The coagulation equipment matched with the dense medium flocculation process of claim 1, wherein an online pH meter is arranged in the flocculation tank (4).
4. The coagulation equipment matched with the dense medium flocculation process of claim 1, wherein the flocculation tank stirrer (5) adopts a propelling blade with adjustable rotation direction.
5. The coagulation equipment matched with the dense medium flocculation process as claimed in claim 1, wherein the water distribution area is connected with a water inlet pipeline, and a water inlet flow meter (11) is arranged on the water inlet pipeline.
6. The coagulation equipment matched with the dense medium flocculation process according to claim 1, wherein an outlet of a backflow water pump (8) is communicated with a water distribution area or a U-shaped communicating pipe (3) through a pipeline; the pipeline is provided with a reflux flowmeter (12).
7. The coagulation equipment matched with the dense medium flocculation process according to claim 1, wherein the compressed air system (9) comprises a compressed air storage tank and a compressed air pipeline (10), the inlet of the compressed air pipeline (10) is connected with the compressed air storage tank, the outlet of the compressed air pipeline is divided into three paths, one path extends into the bottom of the coagulation tank (1) along the side wall of the coagulation tank (1), the other path extends into the bottom of the flocculation tank (4) along the side wall of the flocculation tank (4), and the third path is communicated with the U-shaped communicating pipe (3).
8. The coagulation equipment matched with the heavy medium flocculation process according to claim 7, wherein a plurality of spray heads are arranged on the compressed air pipeline (10) extending into the bottom of the coagulation tank (1) and the compressed air pipeline (10) extending into the bottom of the flocculation tank (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122964817.9U CN216336790U (en) | 2021-11-29 | 2021-11-29 | Coagulation equipment matched with dense medium flocculation process |
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| CN202122964817.9U CN216336790U (en) | 2021-11-29 | 2021-11-29 | Coagulation equipment matched with dense medium flocculation process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956284A (en) * | 2022-05-26 | 2022-08-30 | 华能陇东能源有限责任公司 | Double-fed adjustment-based heavy medium powder dry method automatic adding system and method |
| CN115367852A (en) * | 2022-08-30 | 2022-11-22 | 西安建筑科技大学 | Micro-sand drying method for circulating agglomeration granulation fluidized bed |
-
2021
- 2021-11-29 CN CN202122964817.9U patent/CN216336790U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114956284A (en) * | 2022-05-26 | 2022-08-30 | 华能陇东能源有限责任公司 | Double-fed adjustment-based heavy medium powder dry method automatic adding system and method |
| CN114956284B (en) * | 2022-05-26 | 2023-11-14 | 华能陇东能源有限责任公司 | Automatic dry-method heavy medium powder feeding system and method based on double-fed adjustment |
| CN115367852A (en) * | 2022-08-30 | 2022-11-22 | 西安建筑科技大学 | Micro-sand drying method for circulating agglomeration granulation fluidized bed |
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