Water treatment device of non-uniform plug flow circulating water distribution crystallization fluidized bed

Abstract

The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device comprises a barrel, a partition plate is arranged in the barrel, an inner cavity of the barrel is divided into a descending area and an ascending area by the partition plate, and the two ends of the descending area are communicated with the two ends of the ascending area; the lower portion of the descending area is communicated with a water inlet pipeline, an outlet of the water inlet pipeline is arranged towards a reflecting plate at the bottom of the barrel, and the reflecting plate is used for changing the downward flow direction of water flow in the descending area into the upward flow direction after the water flow enters the ascending area so as to achieve non-uniform flow pushing and circulating water distribution in the barrel. The water distribution structure is simple and reasonable, the engineering cost is remarkably reduced, maintenance is convenient, and energy consumption is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water treatment, in particular to a non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device. Background Art

[0002] The crystallization fluidized bed is a physical and chemical technology that controls the reaction supersaturation and the flow state of the liquid and solid phases to induce crystallization continuously and efficiently. Its most critical structure is the bottom water distribution structure.

[0003] The water distribution structure is the core structure of the crystallization fluidized bed. Its function is to ensure the fluidization of the crystal particles in the fluidized bed while meeting the requirements of efficient and rapid mass transfer, so that the crystallization reaction substrate can quickly diffuse and evenly distribute to every corner in the crystallization fluidized bed to participate in the crystallization reaction.

[0004] The current water distribution structure mostly adopts the porous plate + water distribution head mode.

[0005] Patent CN217025512U proposes a water and medicine distribution structure for induced crystallization granulation fluidized bed softening water treatment, which distributes water by arranging multiple mixed flow nozzles on the partition, and arranges medicine and water inlet pipelines under the partition to achieve water inlet;

[0006] Patent CN215234003U proposes a water and medicine distribution device for chemical crystallization granulation fluidized bed equipment, which distributes water by means of a water distribution orifice plate and a water distribution head;

[0007] Patent CN214936436U proposes a water and medicine discharging device for a crystallization granulation fluidized bed that prevents seed backflow and scaling. The device distributes water by means of a water distribution plate and a water distribution head, and also has the functions of preventing backflow and scaling.

[0008] Patent CN105502692A proposes a chemical crystallization circulating granulation fluidized bed water treatment device, in which the water distribution area and the drug distribution area use a porous plate plus a water distribution head to distribute water and drug;

[0009] The advantage of the water distribution method of the crystallization fluidized bed orifice plate + water distribution head in the above patent is that water is distributed at multiple points and in multiple directions on the cross section to ensure uniformity of water distribution and form an upward push flow. However, the water distribution structure currently has the following problems:

[0010] The structure of the water distribution system using porous plate + water distribution head is complex, requiring a combination of porous plate, load-bearing structure, complex pipelines and water distribution head;

[0011] The water distribution system adopts a porous plate + water distribution head structure. The water distribution head cost is relatively high. The porous plate and complex piping structures will also increase the manufacturing cost of the crystallization fluidized bed.

[0012] The service life of the water distribution head is limited. After about two years of operation, it will appear aging problems. The crystallization fluidized bed needs to be emptied for maintenance. The cost of maintenance and replacement is high and the operation is complicated. Utility Model Content

[0013] Aiming at the technical problems that the current crystallization fluidized bed adopts a complex water distribution system structure of a porous plate + water distribution head and has a high manufacturing cost, a water treatment device for a crystallization fluidized bed with non-uniform plug flow circulation water distribution is proposed. The water distribution structure is simple and reasonable, which significantly reduces the engineering cost, is convenient for maintenance, and saves energy.

[0014] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0015] Non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device,

[0016] It comprises a cylinder, wherein a partition is arranged inside the cylinder, wherein the partition divides the inner cavity of the cylinder into a descending area and an ascending area, and the two ends of the descending area and the ascending area are connected;

[0017] The lower part of the descending zone is connected to a water inlet pipeline, and the outlet of the water inlet pipeline is arranged toward the reflector plate at the bottom of the cylinder. The reflector plate is used to change the downward flow direction of water in the descending zone to an upward flow direction after entering the ascending zone, so as to achieve non-uniform plug flow circulation water distribution inside the cylinder.

[0018] In some technical solutions, the water inlet pipeline includes a water inlet main pipe and a water inlet nozzle connected in sequence, and the nozzle of the water inlet nozzle faces downward and has an angle of 30° to 90° with the horizontal plane.

[0019] In some technical solutions, the angle formed between the water inlet flow direction of the water inlet nozzle and the reflector is less than 60°.

[0020] In some technical solutions, the reflector is a curved surface or a plurality of connected planes or a combination of the two.

[0021] In some technical solutions, the narrowest flow cross section between the partition plate and the reflector plate is a flow gap, and the height of the flow gap is between 20 and 2000 mm.

[0022] In some technical solutions, the reflector is made of alloy, ceramic or quartz.

[0023] In some technical solutions, a water outlet baffle for guiding the backflow is arranged at the top of the descending area and the ascending area, and a water outlet channel is defined between the water outlet baffle and at least one side wall of the cylinder.

[0024] In some technical solutions, the angle between the water outlet baffle and the horizontal plane is in the range of 0 to 75°.

[0025] In some technical solutions, a start-up crystal discharge pipe opening is provided at the bottom of the rising zone, and the vertical height of the start-up crystal discharge pipe opening from the lowest position of the crystallization reaction zone is 5 to 80 cm.

[0026] The utility model adopts the above technical solution to have at least the following beneficial effects:

[0027] 1. The present application proposes a non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device, which uses a pipeline arrangement combined with a reflector to push the liquid flow to form a circulation inside the cylinder, ensuring that pollutants are effectively removed through chemical crystallization circulation granulation between sewage and chemicals. The water distribution structure is extremely simple, does not contain a water distribution plate and a water distribution head, significantly reduces engineering costs, and is not easy to damage and easy to repair;

[0028] 2. The present application proposes a non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device, which adopts a reflector with a curved surface or multiple connected planes or a combination of the two, and has a smooth surface, which can reduce the resistance of the circulating fluid and save energy consumption;

[0029] 3. The present application proposes a non-uniform plug-flow circulation water distribution crystallization fluidized bed water treatment device, which adopts a water inlet nozzle, and the angles between the water inlet nozzle and the horizontal plane and the reflector are all acute angles, so that the water flow sprayed from the water inlet nozzle to the reflector forms a local strong flow field before and after the flow gap at the bottom of the cylinder, driving the entire water distribution area to form violent turbulence along the water inlet direction, accelerating the mixing of fluid and reagent, and improving the crystallization efficiency;

[0030] 4. The present application proposes a non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device, in which a starting crystal discharge pipe port is designed at the bottom of the rising zone, which is used to quickly form a fluidized state of the crystals by aeration or large flow of water when the crystallization fluidized bed equipment is restarted after shutdown. It can also be used as a crystal discharge port to discharge excess crystals. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings and their marks required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0032] Figure 1 It is a structural schematic diagram of the first embodiment of the non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device of the utility model;

[0033] Figure 2 It is a structural schematic diagram of the second embodiment of the non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device of the utility model;

[0034] Figure 3 It is a structural schematic diagram of the third embodiment of the non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device of the utility model.

[0035] The meanings of the symbols in the figure are as follows:

[0036] 10—water inlet main pipe, 11—starting crystal row pipe outlet, 20—water inlet nozzle, 30—reflection plate, 40—rising area, 50—descending area, 60—middle partition, 70—flow gap, 80—water outlet baffle, 90—water outlet channel. DETAILED DESCRIPTION

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the specific implementation methods of the utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0038] In order to simplify the drawings, only the parts related to the utility model are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0039] In this article, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0040] In one embodiment, see Figure 1 A non-uniform plug flow and circulation water distribution crystallization fluidized bed water treatment device is proposed, comprising a cylinder, an intermediate partition 60 is arranged inside the cylinder, the intermediate partition 60 is arranged longitudinally and defines a descending area 50 and an ascending area 40 between the inner side wall of the cylinder, and the two ends of the descending area 50 and the ascending area 40 are connected; the lower part of the descending area 50 is connected to a water inlet pipeline, and the outlet of the water inlet pipeline is arranged toward the reflecting plate 30 at the bottom of the cylinder, and the reflecting plate 30 is used to change the downward flow direction of the water flow in the descending area 50 to an upward flow direction after entering the ascending area 40, so as to achieve non-uniform plug flow and circulation water distribution inside the cylinder.

[0041] In this embodiment, through the arrangement of the water inlet pipeline and the reflection effect of the reflector 30 on the fluid flow direction, a circulation is relatively easy to form inside the cylinder, so as to circulate and granulate the pollutants in the sewage and fully remove them, which not only simplifies the water distribution structure, saves costs, and facilitates later maintenance; but also improves the water treatment efficiency.

[0042] It should be pointed out that the middle partition is not used to limit the partition to be in the middle position of the cylinder, nor is it used to limit the cross-sectional dimensions of the rising area and the descending area separated by the partition to be consistent. It is only used as a basic component to form partitions, and the partition plate can be an arc-shaped plate or a flat plate, or a bent plate or a combination of multiple plates. The specific structure is not limited, and it is only used to form at least one rising area and at least one descending area connected at both ends.

[0043] In the above embodiment, the water inlet pipeline includes a water inlet main pipe 10 and a water inlet nozzle 20 connected in sequence. The nozzle of the water inlet nozzle 20 faces downward and has an angle of 30° to 90° with the horizontal plane. Water enters the nozzle of the water inlet nozzle 20 at a high speed, and the flow rate is above 0.5 m / s, preferably 5 to 15 m / s, to provide fluidization kinetic energy.

[0044] In some preferred embodiments, the angle formed between the water flow direction of the water inlet nozzle 20 and the reflector 30 is less than 60°, preferably 15° to 45°; the narrowest flow section between the middle partition 60 and the reflector 30 is the flow gap 70, and the height of the flow gap 70 is between 20 and 2000 mm, preferably 30 to 300 mm; the high-speed water inflow from the water inlet nozzle 20 forms a local strong flow field before and after the bottom flow gap 70, driving the entire water distribution area to form violent turbulence along the water inlet direction.

[0045] Specifically, the Mohs hardness of the material of the reflector 30 is not less than 5, and may be made of, but not limited to, alloys such as carbon steel, ceramics, and quartz.

[0046] In a specific embodiment of the present application, the reflector 30 is a curved surface, which can minimize the resistance loss of the circulating fluid and thus save power energy consumption.

[0047] In another specific embodiment of the present application, please refer to Figure 2 The reflecting plate 30 is an arc-shaped transition in the middle of the two side planes, which can further enhance the turbulence of the flow field formed by the water outlet of the water inlet nozzle 20 before and after the flow slot 70, ensuring that the fluidized state is always treated.

[0048] In another specific embodiment of the present application, please refer to Figure 3 The reflector 30 is a plurality of connected planes, such as an inverted trapezoidal cross section, which can ensure that the cylinder body is upright without tilting or falling, making the equipment placement more convenient.

[0049] In some specific embodiments, a water outlet baffle 80 for guiding the backflow is provided at the top of the descending area 50 and the ascending area 40 , and a water outlet channel 90 is defined between the water outlet baffle 80 and at least one side wall of the cylinder.

[0050] Specifically, one side of the water outlet baffle 80 is fixed to the inner side wall of the ascending area 40 , and the water outlet channel 90 is formed between the other side opposite thereto and the inner side wall of the descending area 50 .

[0051] Preferably, the water outlet baffle 80 is tilted and its angle with the horizontal plane is in the range of 0 to 75 degrees, which plays a role in guiding the backflow. At the water outlet, the water outlet flow rate is equal to the water inlet flow rate to follow the law of conservation of mass.

[0052] In some preferred embodiments, a starting crystal discharge pipe port 11 is provided at the bottom of the rising zone 40. The vertical height of the starting crystal discharge pipe port 11 from the lowest position of the crystallization reaction zone is 5 to 80 cm. It is used to quickly form a fluidized state of the crystals by aeration or large-flow water inflow when the fluidized bed reactor is restarted after shutdown. It can also be used as a crystal discharge port to discharge excess crystals.

[0053] The operating principle of the above non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device is further described below:

[0054] The crystallization water enters from the water inlet main pipe 10, is sprayed toward the reflection plate 30 at the bottom of the reactor through the water inlet nozzle 20, is reflected and redirected by the reflection plate 30, and flows into the rising area 40 from the flow gap 70 at a relatively high flow rate. A crystallization reaction occurs rapidly in the rising area 40. The top of the rising area 40 is guided by the water outlet baffle 80, part of the water flows out from the water outlet channel, and the remaining water flows into the descending area 50 and flows downward to form a circulation and flows around the middle partition 60.

[0055] When the crystallization fluidized bed reactor is restarted after stopping, water or air is pumped into the crystal discharge pipe 11 to quickly fluidize the crystals. When the crystals in the reactor are fine and the density is too high, some crystals are discharged outward by starting the crystal discharge pipe 11.

[0056] The above-mentioned embodiments only express several implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model shall be based on the attached claims.

Claims

1. Non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device, characterized in that: It comprises a cylinder, wherein a partition is arranged inside the cylinder, wherein the partition divides the inner cavity of the cylinder into a descending area and an ascending area, and the two ends of the descending area and the ascending area are connected; The lower part of the descending zone is connected to a water inlet pipeline, and the outlet of the water inlet pipeline is arranged toward the reflector plate at the bottom of the cylinder. The reflector plate is used to change the downward flow direction of water in the descending zone to an upward flow direction after entering the ascending zone, so as to achieve non-uniform plug flow circulation water distribution inside the cylinder.

2. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: The water inlet pipeline comprises a water inlet main pipe and a water inlet nozzle which are connected in sequence, and the nozzle of the water inlet nozzle faces downward and has an angle of 30° to 90° with the horizontal plane.

3. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 2, characterized in that: The angle formed between the water inlet flow direction of the water inlet nozzle and the reflector is less than 60°.

4. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: The reflector is a curved surface or a plurality of connected planes or a combination of the two.

5. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: The narrowest flow cross section between the partition plate and the reflector plate is a flow gap, and the height of the flow gap is between 20 and 2000 mm.

6. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: The reflector is made of alloy, ceramic or quartz.

7. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: A water outlet baffle for guiding the backflow is arranged on the top of the descending area and the ascending area, and a water outlet flow channel is defined between the water outlet baffle and at least one side wall of the cylinder.

8. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 7, characterized in that: The angle between the water outlet baffle and the horizontal plane is in the range of 0 to 75 degrees.

9. The non-uniform plug flow circulation water distribution crystallization fluidized bed water treatment device according to claim 1, characterized in that: A start-up crystal discharge pipe opening is arranged at the bottom of the ascending zone, and the vertical height of the start-up crystal discharge pipe opening from the lowest position of the crystallization reaction zone is 5 to 80 cm.

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