High-density crystal nucleus pool

Abstract

The utility model provides a high-density crystal nucleus pool, which belongs to the technical field of water treatment and comprises a crystal nucleus feeder, a high-density pool body, a crystal nucleus remover and a sludge concentration unit. The crystal nucleus adding and supplementing device is respectively communicated with a feeding hole of the crystal nucleus remover and a supernate collecting tank in the sludge concentration unit, a high-density tank body is communicated with a crystal nucleus outlet in the bottom of the crystal nucleus remover, and a muddy water outlet in the top of the crystal nucleus remover is communicated with the sludge concentration unit. According to the high-density crystal nucleus pool, the crystal nucleus adding and supplementing device and the crystal nucleus remover are additionally arranged on the basis of a conventional high-density pool, and a specific connection mode and valve control are matched, so that the processes of adding, mixing and separating crystal nucleuses are carried out, and the separation of pollutants and water is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, and relates to a crystal nucleus high-density pool, in particular to a new crystal nucleus high-density pool for chemical hardness removal, turbidity removal, and iron removal flocculation precipitation. Background Art

[0002] High-density tank (also called high-density sedimentation tank or high-efficiency sedimentation tank) is an important sewage treatment process. Its main principle is to remove suspended matter in sewage through gravity sedimentation, and effectively concentrate the suspended matter in sewage to reduce the load of the next treatment process.

[0003] The high-density tank combines a variety of technologies such as chemical reaction, coagulation and flocculation, and sludge concentration to form a complex of "reaction, sedimentation, clarification, and concentration". In this process, the sewage first enters the reaction tank, and after the coagulant is added, the flocculation reaction is carried out, and then it enters the sedimentation area for mud and water separation. The remaining alum flowers will be removed in the inclined pipe, and the concentrated residual sludge at the bottom of the sedimentation area will be transported to the sludge concentration tank through the sludge discharge pump.

[0004] like Figure 1 As shown, the conventional high-density tank includes the first reaction tank (i.e., mixing tank), the second reaction tank, the flocculation tank, and the sedimentation inclined tube tank. The residence time in the mixing tank is 2-5 minutes, the residence time in the second reaction tank is 5-10 minutes, the residence time in the flocculation tank is 10-15 minutes, and the surface load of the sedimentation inclined tube tank is 2-8m 3 / (m 2 h). Conventional high-density tanks remove pollutants from water by adding corresponding chemical agents to react chemically, allowing them to precipitate from the water, and then cooperate with flocculants and coagulants to form precipitation, and separate mud and water in the sedimentation inclined tube tank to achieve the purpose of meeting water production standards. At the same time, the precipitated sludge is transported to the sludge thickening tank by the sludge conveying pump, and the supernatant in the sludge thickening tank enters the supernatant collection tank and returns to the mixing tank through the supernatant lifting pump for circulation treatment.

[0005] This conventional high-density tank has a long flocculation reaction time and a low surface load of the sedimentation inclined tube tank, so it occupies a large area. When dealing with the situation of poor water quality and increased water volume, the adjustable space is small, and floating mud is prone to occur, causing excessive load on subsequent treatment processes, and the sedimentation inclined tube tank needs to be frequently flushed, resulting in a waste of resources. Utility Model Content

[0006] In view of the above problems, the utility model provides a high-density crystal nucleus pool.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A crystal nucleus high-density tank, comprising a crystal nucleus feeder, a high-density tank body, a crystal nucleus remover and a sludge concentration unit;

[0009] The crystal nucleus feeder is connected to the feed port of the crystal nucleus remover and the supernatant collection tank in the sludge concentration unit respectively, the high-density tank body is connected to the crystal nucleus outlet at the bottom of the crystal nucleus remover, and the top mud water outlet of the crystal nucleus remover is connected to the sludge concentration unit.

[0010] Furthermore, the crystal nucleus feeder includes a feeding funnel, an ejector and a bottom support arranged from top to bottom, the feeding funnel is located at the upper end of the ejector, and the feeding funnel and the ejector are respectively fixed on the bottom support in the vertical direction; the nozzle of the feeding funnel is connected to the feeding port of the ejector.

[0011] Furthermore, the sludge concentration unit includes a sludge concentration tank, a sludge dewatering device, a supernatant collection tank and a supernatant lifting pump which are arranged in sequence;

[0012] Among them, the sludge thickening tank is connected with the sludge dewatering device and the crystal nucleus remover respectively, the filtrate outlet of the sludge dewatering device is connected with the supernatant collection tank, and the overflow outlet at the top of the sludge thickening tank is also connected with the supernatant collection tank; the supernatant collection tank is connected with the high-density tank body and the crystal nucleus feeder respectively through the supernatant lifting pump.

[0013] Further, the supernatant lift pump is connected to the opening at the top of the feeding funnel through the second pipe, and the supernatant lift pump is connected to the fluid inlet of the ejector through the third pipe;

[0014] The outlet of the ejector is communicated with the fourth pipeline; the fourth pipeline is communicated with the main pipeline, and the main pipeline is communicated with the feed inlet of the crystal nucleus remover through the sixth pipeline.

[0015] Furthermore, a second control valve is provided on the second pipeline, a third control valve is provided on the third pipeline, a fourth control valve is provided on the fourth pipeline, and a second flow regulating valve is provided on the sixth pipeline.

[0016] Furthermore, the supernatant lifting pump is connected to the main pipe via the first pipe in sequence, and the main pipe is connected to the high-density pool body via the fifth pipe.

[0017] Furthermore, a first control valve is provided on the first pipeline, and a first flow regulating valve is provided on the fifth pipeline.

[0018] Furthermore, the high-density tank body includes a first reaction tank, a second reaction tank, a flocculation tank and an inclined tube sedimentation tank which are arranged in sequence.

[0019] Furthermore, a sludge return pipe is provided at the bottom of the inclined tube sedimentation tank; the sludge return pipe is connected to the sludge conveying pump; the sludge conveying pump is connected to the feed port of the crystal nucleus remover, and the crystal nucleus outlet of the crystal nucleus remover is connected to the second reaction tank.

[0020] Furthermore, a liquid inlet pipe is arranged at the top of the first reaction tank, a first baffle is arranged between the first reaction tank and the second reaction tank, and the height of the first baffle is lower than the height of the high-density tank body; a second baffle is arranged between the second reaction tank and the flocculation tank, and a gap is left between the bottom of the second baffle and the bottom wall of the high-density tank body; a third baffle is arranged between the flocculation tank and the inclined tube sedimentation tank, and the height of the third baffle is lower than the height of the high-density tank body; an overflow pipe for soft water outlet is arranged on the side wall of the inclined tube sedimentation tank; a stirring device is arranged in the first reaction tank, the second reaction tank and the third reaction tank; a mud scraping device is arranged in the inclined tube sedimentation tank.

[0021] The beneficial effects of a crystal nucleus high-density pool of the utility model are:

[0022] Compared with conventional high-density tanks, the crystal nucleus high-density tank of the utility model is based on conventional high-density tanks and is equipped with a crystal nucleus feeder and a crystal nucleus remover, and is combined with a specific connection method and valve control to perform crystal nucleus addition, mixing, and separation processes, thereby achieving separation of pollutants and water;

[0023] Since there are no crystal nuclei in conventional high-density tanks, the flocs formed are relatively light in weight and small in size. Fluctuations in water quality or water volume will result in poor or unqualified water quality (floating mud in the water). The high-density tank of the utility model introduces crystal nuclei to make the precipitated pollutants in the wastewater larger and heavier in the process of forming insoluble flocs, thereby reducing the workload of the inclined tube sedimentation tank during mud-water separation, making sludge sedimentation easier, and no floating mud in the separated clear water will occur due to excessive load of the inclined tube sedimentation tank caused by fluctuations in water quality and water volume.

[0024] The crystal nucleus remover in the utility model utilizes the tangential cyclone separation effect to separate the crystal nucleus from the sludge to realize the reuse of the crystal nucleus;

[0025] The crystal nucleus feeder in the utility model regularly replenishes crystal nuclei to the crystal nucleus high-density pool through the jet principle to ensure a sufficient amount of crystal nuclei. During the crystal nucleus replenishment process, the control valve and program can be manually or automatically controlled to automatically replenish crystal nuclei or manually replenish crystal nuclei as needed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of a conventional crystal nucleus high-density pool in the background technology of the utility model;

[0027] Figure 2 A schematic diagram of a high-density crystal nucleus pool according to an embodiment of the utility model;

[0028] Figure 3 yes Figure 2 A magnified view of part A;

[0029] In the figure: 1. crystal nucleus feeder; 11. feeding funnel; 12. ejector; 13. bottom support; 2. high-density tank body; 21. first reaction tank; 22. second reaction tank; 23. flocculation tank; 24. inclined tube sedimentation tank; 25. sludge conveying pump; 3. crystal nucleus remover; 4. sludge concentration unit; 41. sludge concentration tank; 42. sludge dewatering device; 421. sludge dewatering lifting pump; 43. supernatant collection tank; 44. supernatant lifting pump; 5. control valve; 51. first control valve; 52. second control valve; 53. third control valve; 54. fourth control valve; 55. first flow regulating valve; 56. second flow regulating valve; 6. main pipe; 61. first pipeline; 62. second pipeline; 63. third pipeline; 64. fourth pipeline; 65. fifth pipeline; 66. sixth pipeline. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the utility model are described clearly and completely below. In the following description, many specific details are set forth to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0031] Embodiment A high-density crystal nucleus pool

[0032] See also Figures 2 to 3 The utility model provides a crystal nucleus high-density tank, comprising a crystal nucleus feeder 1, a high-density tank body 2, a crystal nucleus remover 3 and a sludge concentration unit 4;

[0033] The crystal nucleus feeder 1 is respectively connected with the feed port of the crystal nucleus remover 3 and the sludge concentration unit 4, the high-density tank body 2 is respectively connected with the feed port and the crystal nucleus outlet (i.e., the underflow port) of the crystal nucleus remover 3, and the mud water outlet (i.e., the overflow port) of the crystal nucleus remover 3 is connected with the sludge concentration unit 4.

[0034] The high-density tank body 2 includes a first reaction tank 21, a second reaction tank 22, a flocculation tank 23 and an inclined tube sedimentation tank 24 arranged in sequence; the first reaction tank 21, the second reaction tank 22 and the flocculation tank 23 are reaction zones, and the inclined tube sedimentation tank 24 is a sedimentation zone;

[0035] A liquid inlet pipe is arranged at the top of the first reaction tank 21 for introducing wastewater, a first baffle is arranged between the first reaction tank 21 and the second reaction tank 22, and the height of the first baffle is lower than the height of the high-density tank body 2; a second baffle is arranged between the second reaction tank 22 and the flocculation tank 23, and a gap is left between the bottom of the second baffle and the bottom wall of the high-density tank body 2; a third baffle is arranged between the flocculation tank 23 and the inclined tube sedimentation tank 24, and the height of the third baffle is lower than the height of the high-density tank body 2; an overflow pipe for soft water outlet is arranged on the side wall of the inclined tube sedimentation tank 24, and a sludge return pipe is arranged at the bottom; a stirring device (generally a stirrer) is arranged in the first reaction tank 21, the second reaction tank 22 and the third reaction tank; a sludge scraping device is arranged in the inclined tube sedimentation tank 24.

[0036] At the same time, the sludge return pipe is connected to the sludge conveying pump 25; the sludge conveying pump 25 is connected to the feed port of the crystal nucleus remover 3, and the crystal nucleus remover 3 generally adopts a cyclone separator; the crystal nucleus outlet of the cyclone separator is connected to the second reaction tank 22, and the sludge water outlet is connected to the sludge concentration unit 4.

[0037] Furthermore, the crystal nucleus feeder 1 is connected to the second reaction tank 22 through the crystal nucleus remover 3;

[0038] The sludge concentration unit 4 includes a sludge concentration tank 41, a sludge dewatering device 42, a supernatant collecting tank 43 and a supernatant lifting pump 44 which are arranged in sequence; wherein the sludge concentration tank 41 is connected to the sludge dewatering device 42 and the sludge water outlet of the crystal nucleus remover 3 respectively, a sludge dewatering lifting pump 421 is also provided between the sludge concentration tank 41 and the sludge dewatering device 42, the filtrate outlet of the sludge dewatering device 42 is connected to the supernatant collecting tank 43, and the overflow port at the top of the sludge concentration tank 41 is also connected to the supernatant collecting tank 43; the supernatant collecting tank 43 is connected to the first reaction tank 21 and the crystal nucleus feeder 1 respectively through the supernatant lifting pump 44.

[0039] The sludge dewatering device 42 generally adopts a screw filter press, a belt filter press or a plate and frame filter press, etc. Different filter presses can also be selected according to the moisture content requirements of the mud cake.

[0040] The supernatant liquid lifting pump 44 is connected to the main pipe 6 through the first pipe 61 in sequence. The first pipe 61 is provided with a first control valve 51. The main pipe 6 is connected to the first reaction tank 21 through the fifth pipe 65. The fifth pipe 65 is provided with a first flow regulating valve 55.

[0041] The crystal nucleus feeder 1 comprises a feeding funnel 11, an ejector 12 and a bottom support 13 arranged from top to bottom, wherein the feeding funnel 11 is located at the upper end of the ejector 12, and the feeding funnel 11 and the ejector 12 are respectively fixed on the bottom support 13 in the vertical direction; wherein the nozzle of the feeding funnel 11 is connected to the feeding port of the ejector 12;

[0042] The supernatant liquid lifting pump 44 is connected to the opening at the top of the feeding funnel 11 through the second pipeline 62, and the supernatant liquid lifting pump 44 is connected to the fluid inlet of the ejector 12 through the third pipeline 63. The second pipeline 62 is provided with a second control valve 52, and the third pipeline 63 is provided with a third control valve 53;

[0043] The outlet of the ejector 12 is connected to the fourth pipeline 64, on which a fourth control valve 54 is provided; the fourth pipeline 64 is connected to the main pipeline 6, which is connected to the feed port of the crystal nucleus remover 3 through the sixth pipeline 66, on which a second flow regulating valve 56 is provided.

[0044] The crystal nucleus feeder 1 utilizes the feeding funnel 11 to load and replenish the crystal nucleus material, and then uses the high-pressure supernatant to enter the tapered section of the ejector 12 through the pipeline, converting the hydrostatic pressure energy into kinetic energy, and forming a high-speed jet at the nozzle of the ejector 12, so that the mixing chamber forms a micro-vacuum state, and the crystal nuclei in the feeding funnel 11 at the upper end are sucked into the mixing chamber of the ejector 12. At this time, the sprayed water drives the crystal nuclei to be transported to the fourth pipeline 64, and then added to the second reaction tank 22.

[0045] The working mode of a crystal nucleus high-density pool of the utility model is as follows:

[0046] The wastewater enters the first reaction tank 21, and chemical agents are added to the first reaction tank 21. The wastewater reacts with the added chemical agents under the stirring of the stirring device to form precipitated pollutants;

[0047] The mixture of precipitated pollutants and sewage enters the second reaction tank 22 together, and crystal nuclei are added into the second reaction tank 22 through the crystal nucleus remover 3, and a small amount of coagulant (aluminum salt, iron salt) is added at the same time. Under the stirring of the stirring device, the precipitated pollutants collide with the coagulant and crystal nuclei added in the second reaction tank 22 to be fully mixed. The addition of crystal nuclei increases the adhesion of the flocs formed by the precipitated pollutants and helps the flocs to further grow;

[0048] Subsequently, the mixture of enlarged pollutants and sewage enters the flocculation tank 23 together, and a polymer flocculant is added to the flocculation tank 23. At this time, the enlarged pollutants are mixed with the polymer flocculant for further maturation. The matured mixture of pollutants and sewage enters the inclined tube sedimentation tank 24 for mud and water separation. The supernatant of the inclined tube sedimentation tank 24 (i.e., the clean water separated by the inclined tube sedimentation tank 24) is used as soft water outlet and enters the next process or is used directly.

[0049] The sludge intercepted by the inclined tube in the inclined tube sedimentation tank 24 is mixed with crystal nuclei and enters the crystal nucleus remover 3 through the sludge delivery pump 25. The crystal nucleus remover 3 separates the crystal nuclei from the sludge by tangential cyclone separation. The crystal nuclei re-enter the second reaction tank 22 for reuse. The separated sludge enters the sludge thickening tank 41.

[0050] The sludge in the sludge thickening tank 41 is transported to the sludge dewatering device 42 by the sludge dewatering lifting pump 421 for dewatering treatment, and the dewatered mud cake in the sludge dewatering device 42 is subsequently disposed of;

[0051] The supernatant flowing out of the filter press outlet of the sludge dewatering device 42 enters the supernatant collection tank 43. At the same time, the supernatant overflowing from the sludge thickening tank 41 also enters the supernatant collection tank 43. The supernatant in the supernatant collection tank 43 is then transported according to demand by the supernatant lifting pump 44.

[0052] When the high-density pool body 2 needs to be supplemented with crystal nuclei, the crystal nuclei are loaded into the feeding funnel 11 of the crystal nucleus feeder 1, the sludge delivery pump 25 is closed, the second control valve 52, the third control valve 53, the fourth control valve 54 and the second flow regulating valve 56 are opened, and then the supernatant lifting pump 44 is opened to supplement the crystal nuclei. At this time, the first control valve 51 and the first flow regulating valve 55 are in a closed state.

[0053] By filling and replenishing the crystal nuclei in the feeding funnel 11, the crystal nuclei are flushed into the feeding port of the ejector 12 with the help of the pressurized supernatant flowing out of the second pipe 62. At the same time, the pressurized supernatant enters the fluid inlet of the ejector 12 through the third pipe 63, forming a negative pressure in the mixing section of the ejector 12. The crystal nuclei at the feeding port are absorbed into the mixing section of the ejector 12 by the Venturi principle, mixed with the sprayed water, and then transported to the fourth pipe 64 through the diffusion section of the ejector 12, and then transported to the second reaction tank 22.

[0054] Compared with conventional high-density pools (such as Figure 1 Compared with the conventional high-density tank, a crystal nucleus high-density tank of the utility model is newly added with a crystal nucleus feeder 1 and a crystal nucleus remover 3 on the basis of a conventional high-density tank, and then cooperates with a specific connection method and valve control to carry out the crystal nucleus adding, mixing and separation processes, thereby realizing the separation of pollutants and water.

[0055] Since there are no crystal nuclei in conventional high-density tanks, the flocs formed are relatively light and small in size, and fluctuations in water quality or water volume will result in poor or unqualified water quality (floating sludge in the water). The high-density tank of the utility model introduces crystal nuclei to make the precipitated pollutants in the wastewater grow larger and heavier in the process of forming insoluble flocs, thereby reducing the workload of the inclined tube sedimentation tank 24 during mud and water separation, making sludge sedimentation easier, and there will be no more floating sludge in the separated clear water due to excessive load of the inclined tube sedimentation tank 24 caused by fluctuations in water quality and water volume.

[0056] The crystal nucleus in the utility model adopts solid particles, generally inorganic materials such as fine sand or fine ceramsite with a size of 0.01-0.5 mm.

[0057] The crystal nucleus remover 3 in the utility model utilizes the tangential cyclone separation effect to separate the crystal nucleus from the sludge to realize the reuse of the crystal nucleus.

[0058] The crystal nucleus feeder 1 in the utility model regularly replenishes crystal nuclei to the crystal nucleus high-density pool through the jet principle to ensure a sufficient amount of crystal nuclei. During the crystal nucleus replenishment process, the control valve 5 and the program can be manually or automatically controlled to automatically replenish crystal nuclei or manually replenish crystal nuclei as needed.

[0059] Although the embodiments of the present invention have been shown and described, it is understandable to those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principle and spirit of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A high-density crystal nucleus pool, characterized in that: The crystal nucleus high-density tank comprises a crystal nucleus feeder, a high-density tank body, a crystal nucleus remover and a sludge concentration unit; The crystal nucleus feeder is connected to the feed port of the crystal nucleus remover and the sludge concentration unit respectively, the high-density pool body is connected to the crystal nucleus outlet at the bottom of the crystal nucleus remover, and the top mud water outlet of the crystal nucleus remover is connected to the sludge concentration unit.

2. The crystal nucleus high-density pool according to claim 1, characterized in that: The crystal nucleus feeder comprises a feeding funnel, an ejector and a bottom support arranged from top to bottom. The feeding funnel is located at the upper end of the ejector. The feeding funnel and the ejector are respectively fixed on the bottom support in the vertical direction. The nozzle of the feeding funnel is connected to the feeding port of the ejector.

3. The crystal nucleus high-density pool according to claim 2, characterized in that: The sludge concentration unit comprises a sludge concentration tank, a sludge dewatering device, a supernatant collection tank and a supernatant lifting pump which are arranged in sequence; Among them, the sludge thickening tank is connected with the sludge dewatering device and the crystal nucleus remover respectively, the filtrate outlet of the sludge dewatering device is connected with the supernatant collection tank, and the overflow outlet at the top of the sludge thickening tank is also connected with the supernatant collection tank; the supernatant collection tank is connected with the high-density tank body and the crystal nucleus feeder respectively through the supernatant lifting pump.

4. The crystal nucleus high-density pool according to claim 3, characterized in that: The supernatant liquid lift pump is connected to the opening at the top of the feeding funnel through the second pipeline, and the supernatant liquid lift pump is connected to the fluid inlet of the ejector through the third pipeline; The outlet of the ejector is communicated with the fourth pipeline; the fourth pipeline is communicated with the main pipeline, and the main pipeline is communicated with the feed inlet of the crystal nucleus remover through the sixth pipeline.

5. The crystal nucleus high-density pool according to claim 4, characterized in that: The second pipeline is provided with a second control valve, the third pipeline is provided with a third control valve, the fourth pipeline is provided with a fourth control valve, and the sixth pipeline is provided with a second flow regulating valve.

6. The crystal nucleus high-density pool according to claim 5, characterized in that: The supernatant liquid lifting pump is connected with the main pipe in turn through the first pipe, and the main pipe is connected with the high-density pool body through the fifth pipe.

7. The crystal nucleus high-density pool according to claim 6, characterized in that: A first control valve is arranged on the first pipeline, and a first flow regulating valve is arranged on the fifth pipeline.

8. The high-density crystal nucleus pool according to any one of claims 1 to 7, characterized in that: The high-density tank body comprises a first reaction tank, a second reaction tank, a flocculation tank and an inclined tube sedimentation tank which are arranged in sequence.

9. The crystal nucleus high-density pool according to claim 8, characterized in that: A sludge return pipe is provided at the bottom of the inclined tube sedimentation tank; the sludge return pipe is connected to a sludge delivery pump; the sludge delivery pump is connected to a feed port of a crystal nucleus remover, and a crystal nucleus outlet of the crystal nucleus remover is connected to the second reaction tank.

10. The high-density crystal nucleus pool according to claim 8, characterized in that: A liquid inlet pipe is arranged on the top of the first reaction tank, a first baffle is arranged between the first reaction tank and the second reaction tank, and the height of the first baffle is lower than the height of the high-density tank body; a second baffle is arranged between the second reaction tank and the flocculation tank, and a gap is left between the bottom of the second baffle and the bottom wall of the high-density tank body; a third baffle is arranged between the flocculation tank and the inclined tube sedimentation tank, and the height of the third baffle is lower than the height of the high-density tank body; an overflow pipe for soft water outlet is arranged on the side wall of the inclined tube sedimentation tank; stirring devices are arranged in the first reaction tank, the second reaction tank and the third reaction tank; a mud scraping device is arranged in the inclined tube sedimentation tank.

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