CN210133923U - Novel high-efficient sedimentation tank - Google Patents
Novel high-efficient sedimentation tank Download PDFInfo
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- CN210133923U CN210133923U CN201920463339.3U CN201920463339U CN210133923U CN 210133923 U CN210133923 U CN 210133923U CN 201920463339 U CN201920463339 U CN 201920463339U CN 210133923 U CN210133923 U CN 210133923U
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Abstract
The utility model discloses a novel high-efficient sedimentation tank, including the water inlet, the water inlet carries sewage to coagulating zone, coagulating zone inside takes place hydrolysis reaction's hollow structure for the coagulant, coagulating zone bottom will contain the mixed liquid conveying of flocculent granule to flocculating zone through the transmission pipe, flocculating zone's inside is provided with the draft tube, the draft tube periphery is provided with the stabilizer, partly through sludge circulating pump connection circulating sludge pipe of passing through of mud scraper gathering at clarification zone bottom center's mud, another part is connected outer sludge pipe of arranging through the sludge discharge pump, circulating sludge union coupling transmission pipe. The operation range is wide, the impact load resistance is strong, the sludge precipitation efficiency is improved, and the method is a good innovative scheme and has a good market popularization prospect.
Description
Technical Field
The utility model relates to a sewage, sludge treatment field, in particular to novel high-efficient sedimentation tank.
Background
The sedimentation tank is a structure for removing suspended matters in water by applying sedimentation and is equipment for purifying water. The suspended substances in the water are removed by utilizing the natural sedimentation or coagulating sedimentation of the water. The sedimentation tank is divided into a horizontal sedimentation tank, a radial sedimentation tank and a vertical sedimentation tank according to the water flow direction in the tank. The settling effect is determined by the flow rate of the water in the settling tank and the residence time of the water in the tank. In order to improve the sedimentation effect and reduce the land occupation area, a honeycomb inclined tube counter-current sedimentation tank, an accelerated clarification tank, a pulse clarification tank and the like are mostly adopted at present.
In order to ensure better floc formation and water outlet effects, the sludge deposited in the high-efficiency sedimentation tank returns a certain proportion of sludge to a flocculation area through a sludge circulating pump. However, the sludge circulation amount is too large, which is not beneficial to system energy conservation, and simultaneously increases the precipitation load of a clarification area, which affects the effluent effect; the sludge circulation amount is too small, which is not beneficial to the formation and sedimentation of flocs, and when the concentration of suspended matters in the incoming water is greatly changed, the shock load resistance of the system is poor, which affects the water outlet effect.
In view of the above, there is a need for a new high-efficiency sedimentation tank to solve the problems of the prior art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a novel high-efficient sedimentation tank, the modern design, simple structure, operating range is big, and shock resistance load capacity is strong, has improved sludge settling's efficiency, and practicality is excellent, has solved prior art's defect.
In order to achieve the above purpose, the technical solution of the present invention is as follows:
a novel high-efficiency sedimentation tank comprises a water inlet, wherein sewage is conveyed to a coagulation area by the water inlet, a hollow structure of a coagulant for hydrolysis reaction is arranged in the coagulation area, mixed liquid containing flocculent particles is conveyed to a flocculation area through a transmission pipe at the bottom of the coagulation area, a guide cylinder is arranged in the flocculation area, a flow stabilizing plate is arranged at the periphery of the guide cylinder, an annular porous pipe for leading in a flocculant is arranged in the guide cylinder, a baffle plate with a fixed top end and a bottom end and used for circulating flocculent sewage is arranged in the flocculation area, a hollow baffle plate with a fixed bottom end and a hollow top end is arranged at the side edge of the baffle plate, the sewage containing a large amount of flocculent is led into a clarification area through a curing area by the baffle plate in a hollow area at the top, the clarification area flows the flocculent sewage to the bottom of the clarification tank through a guide wall, a sludge scraper with sludge concentration grid bars is arranged at the bottom, the other part is connected with an external sludge discharge pipe through a sludge discharge pump, and a circulating sludge pipe is connected with a transmission pipe.
Furthermore, a coagulant inlet is formed in the top of the coagulation area, a flocculant inlet is formed in the top of the flocculation area, and the flocculant inlet is connected with the annular porous pipe.
Further, the inside of coagulating zone and draft tube all is provided with the agitator, and the agitator includes the puddler, installs stirring vane around the puddler.
Furthermore, the top of the clarification area is provided with an inclined plate for isolating the flocculating constituent.
Further, the sludge circulating pump adopts a variable frequency pump.
Further, Fe salt is adopted as the coagulant, and PAM is adopted as the flocculant.
The utility model has the advantages that: the novel design maintains the higher sludge concentration required by flocculation, so that the concentration of suspended flocculent or crystalline particles is kept in the state required by flocculation, the generated alum floc can be kept complete from the low-speed reaction zone to the settling zone, the quality is uniform, the density is high, the sludge concentration can be effectively completed, the volume of the residual sludge is small, the operation is flexible, the impact load resistance is strong, the water outlet is stable, and the novel sludge flocculation tank is a good innovation scheme and has a good market popularization prospect.
Drawings
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments:
FIG. 1 is a block diagram of the present invention;
in the figure 100-water inlet; 110-a coagulation zone; 120-a flocculation zone; 130-a clarification zone; 140-a baffle; 150-partition plate, 160-transmission pipe, 170-guide cylinder, 180-inclined plate, 190-circulating sludge pipe, 200-discharging sludge pipe, 210-sludge circulating pump, 220-mud scraper, 230-sludge discharge pump.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
As shown in fig. 1, a novel efficient sedimentation tank comprises a water inlet 100, wherein the water inlet 100 conveys sludge to a coagulation area 110, a hollow structure of a coagulant hydrolysis reaction is arranged inside the coagulation area 110, the bottom of the coagulation area 110 conveys mixed liquid of flocculent particles to a flocculation area 120 through a conveying pipe 160, a guide cylinder 170 is arranged inside the flocculation area 120, and a flow stabilizing plate is arranged on the periphery of the guide cylinder 170 and used for fixing the guide cylinder and stabilizing the flow of sewage between the guide cylinder and the wall of the flocculation area. The inside of draft tube 170 is provided with the annular perforated pipe of leading-in flocculating agent, flocculation district 120 is provided with the baffle 140 of the fixed bottom circulation floc sewage of top, the side of baffle 140 is provided with the fixed hollow baffle 150 in top of bottom, baffle 150 is through the hollow interval of top with the floc sewage leading-in clarification district 130, clarification district 130 flows the floc sewage to the clarification tank bottom through the guide wall, clarification district 130 bottom sets up the mud scraper 220 of taking the mud concentration grid, mud scraper 220 gathers in clarification district bottom center's mud partly through sludge circulating pump 210 connection circulating sludge pipe 190, mud scraper 220 gathers in clarification district bottom center's mud another part through mud discharge pump 230, circulating sludge pipe 190 connects transmission pipe 160, sludge circulating pump 210 adopts the inverter pump.
In addition, a coagulant inlet is formed in the top of the coagulation area 110, a flocculant inlet is formed in the top of the flocculation area 120, the flocculant inlet is connected with an annular porous pipe, Fe salt is used as the coagulant, and PAM is used as the flocculant.
In addition, the inside of coagulating basin 110 and draft tube 170 all is provided with the agitator, and the agitator includes the puddler, and the stirring vane is installed around the puddler, and clarification district 130 top is provided with the swash plate 180 of keeping apart the flocculating constituent.
The concentration of suspended matters in sewage is usually in change, and particularly when the water to be treated is river water, the change amplitude of the suspended matters in the water is relatively large, so that the stability of system operation is influenced to a certain extent. When the concentration of the influent suspended matters is low, the probability of forming large alum flocs by mutual collision among flocs is low, and the flocs are not easy to settle. When the concentration of the influent suspended matter is high, it is possible to simultaneously generate two types of micro-flocs with different sizes.
When the above two cases are met, the treatment efficiency must be improved by refluxing the activated sludge, and the sludge refluxing process has the following advantages:
under the working condition of low turbidity water inlet, the returned sludge can maintain higher sludge concentration in the flocculation zone. Therefore, the micro-flocs generated in the coagulation zone have a greater chance of colliding to form large alum flocs after entering the flocculation zone.
Under the working condition of high turbidity water inflow, the reflowing flocs can help micro flocs in water to form flocs.
Because the flocs in the returned sludge are more compact, the formed flocs have good structure and are more stable.
The retention time of the flocs in the system is longer, and the flocs can fully adsorb organic matters and other pollutants in water, so that the system has higher removal rate of the matters.
The sludge circulation quantity is controlled according to the inlet water quantity and the water quality and is related to the concentration of suspended matters in the inlet water and the operation mode (hardness removal mode or non-hardness removal mode) of the high-efficiency sedimentation tank. Taking a non-hardness removal mode as an example, a certain sludge concentration in a flocculation area is kept between 600mg/L and 800mg/L, the sludge concentration in the flocculation area is 10-15 times of the concentration of suspended matters in inlet water, when the inlet water index fluctuates greatly, the operation can still be stable, and the quality of outlet water can still be stabilized in an acceptable range; the operation range of the high-efficiency sedimentation tank is larger, and the impact load resistance is stronger.
The water inlet amount Q1, water inlet suspended matters X1, circulating sludge amount Q2, circulating sludge concentration X2 and sludge density X3 in the guide shell are in the following relationship:
q1 × X1+ Q2 × X2 ═ Q1+ Q2 × X3 formula one
It can be found that the circulating sludge amount Q2:
q2 ═ Q1 × X3-Q1 × X1)/(X2-X3) formula two
And selecting a proper sludge circulating pump according to the calculated sludge circulating amount, wherein the sludge circulating pump is set in a frequency conversion mode, and the frequency conversion control principle follows a formula II.
The water enters a coagulation area through a water distribution channel, a coagulant is added, the coagulant is subjected to hydrolysis reaction to generate a large amount of charged ions, an original colloid charge system is neutralized, suspended matter impurities in the water are unstably coagulated to form a large amount of flocculent particles to form small alum flocs, and the mixed liquid enters a flocculation area through a pipeline. The flocculation area is provided with a guide shell, and a flocculating agent is injected into the guide shell through an annular porous pipe positioned in the guide shell. The alum floc is heavy, the sewage containing a large amount of flocs leaves the flocculation area from the bottom of the flocculation area, and the flow guide wall guides the water flow to the bottom of the clarification tank, so that the short flow caused by the direct flow to the inclined tube clarification area at the top of the tank is avoided. The heaviest alum flocs are precipitated, the lightest alum flocs are intercepted in an inclined plate, and the precipitated flocs are collected by a mud scraper and finally concentrated to the center of the bottom of the tank. Clear water is collected by a water collecting tank and enters a subsequent treatment structure, sediment is scraped into a mud bucket by a mud scraper, part of sludge is conveyed to a reactor by lifting of a circulating sludge pipe, and residual sludge is discharged.
The utility model has the advantages that: the novel design maintains the higher sludge concentration required by flocculation, so that the concentration of suspended flocculent or crystalline particles is kept in the state required by flocculation, the generated alum floc can be kept complete from the low-speed reaction zone to the settling zone, the quality is uniform, the density is high, the sludge concentration can be effectively completed, the volume of the residual sludge is small, the operation is flexible, the impact load resistance is strong, the water outlet is stable, and the novel sludge flocculation tank is a good innovation scheme and has a good market popularization prospect.
It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (6)
1. The utility model provides a novel high-efficient sedimentation tank, includes the water inlet, its characterized in that: the sewage is conveyed to a coagulation area by a water inlet, a hollow structure of a coagulant for hydrolysis reaction is arranged in the coagulation area, the bottom of the coagulation area conveys mixed liquid containing flocculent particles to a flocculation area through a transmission pipe, a guide cylinder is arranged in the flocculation area, a flow stabilizing plate is arranged on the periphery of the guide cylinder, an annular porous pipe for leading in a flocculant is arranged in the guide cylinder, a baffle plate with a fixed top end and a fixed bottom end for circulating flocculent sewage is arranged in the flocculation area, a hollow baffle plate with a fixed bottom end and a hollow top end is arranged on the side edge of the baffle plate, the sewage containing a large amount of flocculents is led into a clarification area through a curing area by the baffle plate, the clarification area flows the flocculent sewage to the bottom of a clarification tank through a guide wall, a mud scraper with a mud concentration grid bar is arranged at the bottom of the clarification area, one part of the sludge gathered at the center of the bottom of the clarification area through, the circulating sludge pipe is connected with the transmission pipe.
2. The novel efficient sedimentation tank of claim 1, wherein: the top of the coagulation area is provided with a coagulant inlet, the top of the flocculation area is provided with a flocculant inlet, and the flocculant inlet is connected with an annular porous pipe.
3. The novel efficient sedimentation tank of claim 1, wherein: the inside of coagulating zone and draft tube all is provided with the agitator, and the agitator includes the puddler, installs stirring vane around the puddler.
4. The novel efficient sedimentation tank of claim 1, wherein: the top of the clarification area is provided with an inclined plate for isolating the flocculating constituent.
5. The novel efficient sedimentation tank of claim 1, wherein: the sludge circulating pump adopts a variable frequency pump.
6. The novel efficient sedimentation tank of claim 1, wherein: the coagulant is Fe salt, and the flocculant is PAM.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920463339.3U CN210133923U (en) | 2019-04-08 | 2019-04-08 | Novel high-efficient sedimentation tank |
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| CN201920463339.3U CN210133923U (en) | 2019-04-08 | 2019-04-08 | Novel high-efficient sedimentation tank |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358115A (en) * | 2020-09-28 | 2021-02-12 | 安徽普氏生态环境工程有限公司 | Efficient sludge backflow reinforced magnetic coagulation system and sedimentation method thereof |
| CN113292182A (en) * | 2021-07-07 | 2021-08-24 | 盛发环保科技（厦门）有限公司 | Multifunctional integrated flocculation clarification equipment |
| CN113968608A (en) * | 2021-06-25 | 2022-01-25 | 北京绿恒科技有限公司 | Self-circulation encrypted granular sludge filtering sedimentation tank |
-
2019
- 2019-04-08 CN CN201920463339.3U patent/CN210133923U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112358115A (en) * | 2020-09-28 | 2021-02-12 | 安徽普氏生态环境工程有限公司 | Efficient sludge backflow reinforced magnetic coagulation system and sedimentation method thereof |
| CN113968608A (en) * | 2021-06-25 | 2022-01-25 | 北京绿恒科技有限公司 | Self-circulation encrypted granular sludge filtering sedimentation tank |
| CN113292182A (en) * | 2021-07-07 | 2021-08-24 | 盛发环保科技（厦门）有限公司 | Multifunctional integrated flocculation clarification equipment |
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