CN220564427U - Water treatment device of chemical crystallization forced circulation granulation fluidized bed - Google Patents

Abstract

The application provides a chemical crystallization forced circulation granulation fluidized bed water treatment facilities, water treatment facilities includes urceolus, inner tube and the open annular cavity in both ends, annular cavity forms the section of thick bamboo lateral wall of inner tube with between the section of thick bamboo lateral wall middle part region of urceolus, water treatment facilities includes the jet orifice, the jet orifice with the bottom regional intercommunication of annular cavity, the jet orifice slope sets up, in order to pass through the jet orifice is inwards and the open department of bottom of annular cavity is sprayed water down to the slant. The method has the advantages of forced circulation, high softening efficiency, difficult occurrence of choking faults, high seed crystal utilization rate, less seed crystal consumption, difficult occurrence of particle hardening, compactness, small occupied area, low construction and manufacturing cost, low operation and maintenance cost and the like.

Description

Water treatment device of chemical crystallization forced circulation granulation fluidized bed

Technical Field

The application relates to the technical field of water treatment, in particular to a chemical crystallization forced circulation granulation fluidized bed water treatment device.

Background

The chemical crystallization method is a softening and hardening removal method commonly used for industrial circulating water, and when the method is used for softening and hardening removal, seed crystals are added into a chemical crystallization circulating granulation fluidized bed water treatment device, and the softening reaction is accelerated by utilizing nucleation guidance of the seed crystals.

CN201510864696.7 discloses a typical chemical crystallization circulating granulation fluid bed water treatment device. The circulation path of the water treatment device is as follows:

the high-hardness water and the medicament are respectively added to the bottom of the outer cylinder through a water distributor and a medicament distributor. Small particle seed crystals are added into the bottom area of the annular cavity between the outer cylinder and the inner cylinder and fall from the bottom opening of the annular cavity to be mixed with high-hardness water. The high hardness water mixed with the medicament and seed rises into the fluidization region of the inner barrel at a relatively high flow rate.

In the fluidization zone, chemical decleration crystallization reaction occurs, and the surfaces of the small seed particles are continuously crystallized, so that the small seed particles are continuously grown into large seed particles. And fluidization brings small seed particles up and large seed particles down.

The large seed particles below are discharged from a particle discharge pipe at the bottom of the outer cylinder. The small seed crystal particles on the upper part are turned into an annular cavity between the inner cylinder and the outer cylinder from the top end of the inner cylinder, gradually sink down, fall from the bottom end opening of the annular cavity together with the small particle seed crystals newly fed in, and are flushed by the high-hardness water again to enter a fluidization area to participate in chemical hard-removing crystallization reaction.

The water treatment device has the following disadvantages:

(1) Although this water treatment apparatus is intended to construct a circulation path forming the above-described "liquid phase rise in the inner tube, liquid phase fall in the annular cavity", it is difficult to form the above-described circulation path under the influence of bottom turbulence, and in reality, both the liquid phases in the inner tube and the annular cavity rise, and even it may occur that the liquid phase rise rate in the annular cavity is greater than the liquid phase rise rate in the inner tube, resulting in difficulty in falling small particle seeds turned into the annular cavity from the top end of the inner tube and newly added small particle seeds from the bottom end of the annular cavity, thereby causing "choking" failure.

(2) The upward flow velocity in the inner cylinder has no obvious boundary, so that large seed crystal particles and small seed crystal particles cannot be well screened, and the small seed crystal particles are entrained when the large seed crystal particles are discharged, so that the seed crystal utilization rate is low and the seed crystal consumption is high.

(3) The seed crystal charging tube and the cylinder body need to be provided with a sealing structure, the seed crystal needs to be mixed with the fluid by the stirring device and then conveyed by the pumping device, the setting of the stirring device and the pumping device increases the construction and manufacturing cost, and the seed crystal is usually hard rock mineral and can generate larger loss to the pumping device, so that the pumping device needs to be replaced and maintained regularly, and the operation and maintenance cost is increased.

(4) The medicine distributor and the water distributor are both positioned in the bottom area of the outer barrel and are both in complex structures with interlayers, so that more disturbance dead areas exist in the bottom area of the outer barrel, particle hardening is easy to occur, and fluidization and discharge of large seed particles are influenced.

Therefore, how to avoid some or all of the above drawbacks is a technical problem that needs to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the problem, the utility model provides a chemical crystallization forced circulation granulation fluidized bed water treatment facilities, water treatment facilities includes urceolus, inner tube and the open annular cavity in both ends, annular cavity forms the section of thick bamboo lateral wall of inner tube with between the section of thick bamboo lateral wall middle part region of urceolus, water treatment facilities includes the jet, the jet with the bottom region intercommunication of annular cavity, the jet slope sets up, in order to pass through the jet is inwards and the open department of bottom of annular cavity sprays water downwards to the slant.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a bottom cylinder, wherein the bottom cylinder is positioned in the bottom area of the outer cylinder and at the bottom side of the inner cylinder, and the inner diameter of the side wall of the bottom cylinder is smaller than that of the side wall of the inner cylinder.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises an annular conical plate, wherein the top end of the barrel side wall of the bottom barrel is connected with the barrel side wall of the outer barrel through the annular conical plate, an annular gap for water supply jet to pass through is formed between the annular conical plate and the bottom end of the barrel side wall of the inner barrel, the annular conical plate is provided with an annular step surface, the top end of the annular step surface is inclined inwards relative to the bottom end, and a jet port is arranged on the annular step surface.

An implementation mode of a chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a jet water cavity, a circulating pipeline and a water producing pump; the jet water cavity is communicated with the jet port, is positioned in the outer cylinder and is formed by enclosing the side wall of the outer cylinder and the annular conical plate; the circulating pipeline is used for introducing part of produced water of the water treatment device into the jet water cavity, and the produced water pump is connected to the circulating pipeline.

An implementation mode of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a throttling element, wherein an inlet of the throttling element is communicated with the circulation pipeline, and an outlet of the throttling element is used as a water production outlet of the water treatment device.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a buffer cavity and an annular partition plate, wherein the buffer cavity is positioned in the outer cylinder, the annular partition plate separates the jet flow water cavity from the buffer cavity, the cylinder wall of the outer cylinder, the cylinder side wall of the bottom cylinder and the annular partition plate participate in enclosing to form the buffer cavity, and the circulation pipeline is communicated with the jet flow water cavity and the buffer cavity.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a water inlet assembly, wherein the water inlet assembly comprises a water inlet spray pipe, the water inlet spray pipe is positioned in the bottom area of the outer barrel, and a water spray port is arranged at the bottom end of the water inlet spray pipe.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises an annular overflow trough, wherein the annular overflow trough is positioned in the top area of the outer barrel.

An implementation mode of a chemical crystallization forced circulation granulation fluidized bed water treatment device, the water treatment device comprises a dosing assembly, the dosing assembly comprises an annular dosing collecting pipe outside an outer cylinder and a plurality of dosing branch pipes which are sequentially arranged at intervals along the circumferential direction, the dosing branch pipes penetrate through holes in an annular step surface, the outer ends of the dosing branch pipes are communicated with the annular dosing collecting pipe, the inner ends of the dosing branch pipes are provided with dosing ports, the dosing ports are arranged adjacent to the injection ports, the dosing ports are communicated with the bottom area of an annular cavity, and the dosing ports are obliquely arranged so as to spray medicament through the bottom opening of the annular cavity obliquely inwards and obliquely downwards.

One embodiment of the chemical crystallization forced circulation granulation fluidized bed water treatment device comprises a seed crystal feeding component, wherein the seed crystal feeding component comprises a feeding pipe, a feeding hole is formed in the top end of the feeding pipe, a discharging hole is formed in the bottom end of the feeding pipe, the feeding hole is located above an overflow hole of the outer cylinder, and the discharging hole is located below the overflow hole of the outer cylinder and above the overflow hole of the inner cylinder.

The jet mouth is arranged in the jet mouth and is communicated with the bottom area of the annular cavity, and the jet mouth is obliquely arranged so as to spray water to the bottom opening of the annular cavity obliquely inwards and obliquely downwards through the jet mouth. Thus, the bottom area of the annular cavity forms a low-pressure area, the liquid phase in the annular cavity is forced to descend, and a circulation path of ascending the liquid phase in the inner cylinder and descending the liquid phase in the annular cavity is forced to be formed; moreover, the seed crystal particles in the annular cavity can be promoted to fall from the bottom opening of the annular cavity, so that choke faults are avoided; moreover, jet flow can compensate the rising flow rate of the inner cylinder, so that the inner cylinder keeps higher fluidization efficiency; in addition, the raw water to be treated flows upwards, so that the water sprayed from the jet orifice and the medicament sprayed from the medicament spraying orifice can form a countercurrent mixing effect with the raw water, uniform mixing of the medicament and seed crystal particles with the raw water is facilitated, and in addition, the periphery of the medicament spraying orifice is treated soft water with the descending annular cavity, and the medicament spraying orifice is not blocked due to scaling caused by softening reaction.

Drawings

FIG. 1 is a schematic view of one embodiment of a water treatment apparatus provided herein;

FIG. 2 is a view in the A-A direction of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a schematic view of the water flow path of the water treatment apparatus shown in FIG. 1;

FIG. 5 is a schematic view of the particle distribution and particle trajectories of the water treatment device shown in FIG. 1;

the reference numerals are explained as follows:

10 outer cylinder, 20 inner cylinder, 30 annular cavity, 40 bottom cylinder;

50 annular conical plates, 50a annular step surfaces;

60 jet water cavities, 70 circulation pipelines, 80 water producing pumps, 90 throttling elements, 100 water producing tanks, 110 buffer cavities and 120 annular partition plates;

130 water inlet assembly, 131 water inlet spray pipe, 132 water inlet header, 133 raw water pump, 134 raw water tank;

140 annular overflow tanks; 150 diversion channels;

160 dosing assemblies, 161 annular dosing manifolds, 162 dosing branches, 163 dosing pumps;

170 a discharge conduit; 180 a dehydration device;

190 feed pipe, 190a feed inlet, 190b discharge outlet;

the injection port A, the annular gap B, the water jet C and the medicine jet D.

Detailed Description

In order to make those skilled in the art better understand the technical solutions of the present application, the technical solutions of the present application are further described in detail below with reference to the accompanying drawings and the detailed description.

Referring to fig. 1-3, the chemical crystallization forced circulation granulation fluidized bed water treatment device (hereinafter referred to as water treatment device) provided in the present application at least includes an outer cylinder 10, an inner cylinder 20, an annular cavity 30, a jet port a, a medicine spraying port D, a water inlet assembly 130, a medicine adding assembly 160, and a seed crystal throwing assembly (190 in the figure).

The water inlet assembly 130 is used to introduce raw water to be treated.

The dosing assembly 160 is used for introducing a medicament which can react with calcium, magnesium and the like in the raw water to soften the raw water, and the medicament is sprayed out through the spraying port D. Specifically, the medicine spraying port D is disposed adjacent to the injection port a, and is communicated with the bottom region of the annular cavity 30, and is obliquely disposed so as to spray the medicine through the medicine spraying port D obliquely inward and obliquely downward toward the bottom opening of the annular cavity 30.

The seed crystal throwing component is used for introducing seed crystals so as to accelerate the softening reaction.

An annular cavity 30 is formed between the cylinder side wall of the inner cylinder 20 and the cylinder side wall of the outer cylinder 10, and both the top and bottom ends of the annular cavity 30 are open.

Jet a communicates with the bottom region of the annular cavity 30, and is inclined so as to spray water obliquely inwards and obliquely downwards through the jet a toward the bottom opening of the annular cavity 30.

The jet port A is communicated with the bottom area of the annular cavity 30, and is obliquely arranged, so that the bottom area of the annular cavity 30 can form a low-pressure area to force the liquid phase in the annular cavity 30 to descend, and a circulation path of 'liquid phase in the inner cylinder 20 to ascend and the liquid phase in the annular cavity 30 to descend' is formed forcibly (see fig. 4); moreover, the seed particles in the annular cavity 30 can be promoted to fall from the bottom opening of the annular cavity 30, so that choke faults are avoided; moreover, the jet flow can compensate the rising flow rate of the inner cylinder 20, so that the inner cylinder 20 keeps higher fluidization efficiency; moreover, since the raw water to be treated flows upwards, the water sprayed from the jet port A can form a countercurrent mixing effect with the raw water, thereby being beneficial to uniformly mixing seed crystal particles with the raw water;

the chemical spraying opening D is arranged adjacent to the jet opening A, the chemical spraying opening D is communicated with the bottom area of the annular cavity 30, and the chemical spraying opening D is obliquely arranged, so that the jet effect of jet water can be fully utilized to achieve the effect of mixing the chemical agent and raw water strongly, the strongest initial softening reaction is suspended (namely, the intersection area of the bottom end of the inner cylinder 20 and the top end of the bottom cylinder 40 in the figure) so as to reduce the scaling probability of the bottom wall of the cylinder, improve the operation safety and stability of the device, and the periphery of the chemical spraying opening D is treated soft water after the annular cavity 30 is lowered, so that the chemical spraying opening D is not easy to be scaled and blocked due to the softening reaction.

In one embodiment, referring to FIG. 1, the water treatment apparatus is further provided with a bottom cartridge 40. The bottom cartridge 40 is located in the bottom region of the outer cartridge 10 and on the bottom side of the inner cartridge 20. The bottom cartridge 40 has a cartridge sidewall inner diameter that is less than the cartridge sidewall inner diameter of the inner cartridge 20. The top end of the bottom cylinder 40 is open, and the bottom end of the bottom cylinder 40 is closed. Specifically, the bottom end of the bottom cylinder 40 may be connected with the bottom cylinder wall of the outer cylinder 10 to close the bottom end of the bottom cylinder 40 by the bottom cylinder wall of the outer cylinder 10, and the bottom cylinder wall of the outer cylinder 10 may be provided as a flat bottom to save construction costs.

Since the inner diameter of the barrel sidewall of the bottom barrel 40 is smaller than that of the inner barrel 20, the upward flow rates in the two can form a distinct boundary, so that the bottom barrel 40 can be arranged to screen large seed particles and small seed particles well, thereby avoiding the problems of low seed utilization rate and large consumption caused by the discharge of the small seed particles along with the large seed particles.

In addition, when the bottom cylinder 40 is arranged, as the reaction proceeds, part of the particle size reaches the control size, and then falls into the bottom cylinder 40 due to the fact that the particle size is too large and can not be fluidized, and the bottom cylinder 40 also plays a role in collecting and storing large seed particles, and the particles falling into the bottom cylinder 40 still can remain fluidized due to the fact that the flow rate in the bottom cylinder 40 is high, so that hardening is not easy.

The particles in the bottom drum 40 can be discharged periodically through the discharge pipeline 170 after being quantified, the discharged particles can be dehydrated and transported outwards through the dehydration device 180, and the dehydrated water can be recycled into the original water tank 134.

In one embodiment, referring to fig. 2, the top end of the cartridge sidewall of the bottom cartridge 40 is connected to the cartridge sidewall of the outer cartridge 10 by an annular tapered plate 50. An annular gap B is formed between the annular tapered plate 50 and the bottom end of the barrel sidewall of the inner barrel 20 through which the water jet passes. The annular tapered plate 50 is provided with an annular stepped surface 50a, the top end of the annular stepped surface 50a is inclined inward with respect to the bottom end, and jet ports a are provided on the annular stepped surface 50a, specifically, a plurality of jet ports a are provided at intervals in the circumferential direction of the annular stepped surface 50a in sequence (see fig. 3).

By the design, water sprayed from the jet orifice A can obliquely downwards and obliquely inwards pass through the annular gap B under the guiding action of the annular conical plate 50 to form a strong countercurrent mixing effect with high-speed upward flow, so that the effect of obviously improving the mixing uniformity of the medicament, seed crystal particles and raw water is achieved. In addition, the jet port A is formed on the annular step surface 50a of the annular conical plate 50, so that the jet structure is simple, the manufacturing cost is low, and the assembly is convenient.

In one embodiment, referring to FIG. 1, a water treatment apparatus is provided with a jet water chamber 60, a circulation line 70, and a water producing pump 80. The jet water cavity 60 is communicated with the jet port A, the jet water cavity 60 is positioned in the outer cylinder 10, and is formed by the cylinder side wall of the outer cylinder 10 and the annular conical plate 50 in a surrounding manner. The circulation line 70 is used to introduce part of the produced water of the water treatment device into the jet water chamber 60. The water producing pump 80 is connected to the circulation line 70, and the pumping pressure of the water producing pump 80 pushes the water in the jet water chamber 60 to be ejected through the jet port a.

By such design, the jet water cavity 60 is highly integrated with the cylinder body, and no additional component for supplying jet water is needed, so that the water treatment device is compact, occupies small area and has low construction cost.

In one embodiment, referring to fig. 1, the water treatment apparatus is provided with a throttling element 90, an inlet of the throttling element 90 is communicated with the circulation line 70, and an outlet is used as a water outlet of the water treatment apparatus, and water discharged from the water outlet can be stored in the water production tank 100. Specifically, the throttle element 90 may be a back pressure valve that is easy to regulate, or may be any element having a throttle function, such as a damping orifice plate. By arranging the throttling element 90, the water yield can be distributed by adjusting the throttling element 90, so that part of the water yield enters the water yield tank 100 under the action of the water yield pump 80, and the other part of the water yield flows back to the jet water cavity 60 under the action of the water yield pump 80, and two-way pumping can be realized by only arranging one water yield pump 80.

In one embodiment, referring to FIG. 1, a water treatment apparatus is provided with a buffer chamber 110 for buffering produced water of the water treatment apparatus. The circulation line 70 communicates the jet water chamber 60 with the buffer chamber 110. By the design, the buffer requirement of partial produced water as jet water backflow can be met.

In one embodiment, referring to fig. 1, the buffer chamber 110 is located in the outer cylinder 10, the annular partition 120 separates the jet water chamber 60 from the buffer chamber 110, the cylinder wall of the outer cylinder 10, the cylinder side wall of the bottom cylinder 40, and the annular partition 120 participate in enclosing to form the buffer chamber 110, while the annular partition 120 also participates in enclosing to form the jet water chamber 60. By the design, the buffer cavity 110 and the jet water cavity 60 are highly integrated with the cylinder, so that the water treatment device is compact, small in occupied area and low in construction cost.

In one embodiment, referring to fig. 3, the water inlet assembly 130 includes a plurality of water inlet nozzles 131, the water inlet nozzles 131 being located in the bottom region of the outer tub 10, and the water inlet nozzles 131 being further located in the bottom region of the bottom tub 40 when the bottom tub 40 is provided. The plurality of water inlet nozzles 131 are uniformly dispersed and arranged. The top end of the water inlet spray pipe 131 is communicated with a water inlet main pipe 132, the water inlet main pipe 132 is communicated with a raw water tank 134, and a raw water pump 133 is connected to the water inlet main pipe 132. The bottom of the water inlet nozzle 131 is provided with a water spray opening C, so that raw water is sprayed downwards through the bottom water spray opening C. The raw water is ejected, and then collides with the bottom wall of the bottom cartridge 40 or the bottom wall of the outer cartridge 10, and then flows in a rebound upward direction (see fig. 4). By the design, particles deposited on the bottom wall of the cylinder can be effectively disturbed, and because the water inlet assembly 130 is of a simple pipe structure and is not provided with a structure such as an interlayer which is easy to generate dead zones, the disturbance dead zones in the bottom area of the cylinder are fewer, particle hardening is difficult to occur, and the manufacturing cost is low.

In one embodiment, referring to fig. 1, the water treatment apparatus is provided with a circular overflow tank 140, and the circular overflow tank 140 is disposed in the top region of the outer tub 10, realizing the embedment of the circular overflow tank 140. The annular overflow tank 140 is internally provided with a design, so that the water treatment device is more compact and is convenient to communicate with the buffer cavity 110 in the outer cylinder 10. Specifically, the annular overflow groove 140 and the buffer cavity 110 may be communicated through a built-in flow guiding channel 150, and the annular partition 120 and the annular conical plate 50 are provided with through holes through which the flow guiding channel 150 passes.

In one embodiment, referring to fig. 1-3, the dosing assembly 160 includes an annular dosing manifold 161 surrounding the outer barrel 10 and a plurality of dosing branches 162 spaced apart in a circumferential sequence. The annular dosing manifold 161 communicates with a dosing pump 163. The annular dosing manifold 161 is externally positioned for ease of assembly. The outer end of the dosing branch pipe 162 communicates with the annular dosing manifold 161, and the dosing port D is provided at the inner end of the dosing branch pipe 162. The annular stepped surface 50a of the annular tapered plate 50 is provided with a plurality of through holes at positions avoiding the jet orifice A, and the drug adding branch pipe 162 is arranged in the through holes in a penetrating manner, so that the inner end of the drug adding branch pipe 162 can extend to the inner side of the annular stepped surface 50a when necessary, and the drug spraying orifice D can be positioned at the inner side of the annular stepped surface 50 a.

In one embodiment, referring to fig. 1, the seed crystal feeding assembly includes a feeding tube 190, a feeding port 190a is provided at the top end of the feeding tube 190, a discharging port 190b is provided at the bottom end of the feeding tube 190, the feeding port 190a is located above the overflow port of the outer cylinder 10, and the discharging port 190b is located below the overflow port of the outer cylinder 10 and above the overflow port of the inner cylinder 20. In this design, the dry seed crystal can be directly thrown from top to bottom without arranging a pumping device and a stirring device, so that the construction cost and the operation and maintenance cost can be saved, moreover, since the discharge port 190b is positioned below the overflow port of the outer cylinder 10, the thrown seed crystal does not enter the annular overflow groove 140 along with the overflow liquid level of the outer cylinder 10, and since the discharge port 190b is positioned above the overflow port of the inner cylinder 20, the seed crystal can uniformly and dispersedly enter the annular cavity 30 along with the fountain-shaped overflow of the inner cylinder 20 (see fig. 5), and the uniform feeding of the seed crystal is realized.

In conclusion, the method has the advantages of being capable of forcing to form circulation, high in softening efficiency, not prone to choking faults, not prone to scaling and blocking of a spraying port, high in seed crystal utilization rate, low in seed crystal consumption, not prone to particle hardening, compact, small in occupied area, low in construction and manufacturing cost, low in operation and maintenance cost and the like.

An application example of the present application is specifically described below:

the water yield of the application example is 50m ³ And/h. Small seed particles were initially charged with particle size d=0.5 mm, initial fluidization velocity 60m/h, and carry-over flow rate 100m/h. The large seed particles after the softening reaction had an upper limit D=3 mm for the discharge particle size, an initial fluidization velocity of 90m/h and a discharge flow velocity of 130m/h. Five water inlet spray pipes are arranged, the caliber of each water inlet spray pipe is DN25, and the flow speed of a water jet can reach 5.5m/s. The inner diameter of the bottom box is 780mm, the height is 800mm, and the rising flow velocity in the bottom box can be realizedAnd the size and the rectifying requirements of the large and small particles can be met by 104m/h, and the storage capacity of the coarse particles can be considered. The taper of the annular tapered plate was 45 °. The annular conical plate is provided with 72 jet orifices with phi 5, and the distance between the jet orifices is about 49mm, so that jet flow can cover the whole annular gap between the inner cylinder and the annular conical plate, and the jet flow speed of the jet orifices can reach 5m/s. The height dimension of the annular gap between the inner cylinder and the annular conical plate is 50mm. Producing water and refluxing jet water at 50m ³ /h、25m ³ And/h allocation. The volume of the buffer cavity is 1.2m ³ The annular overflow groove is communicated with the buffer cavity through four flow guide channels of DN 80. The annular dosing collecting pipe adopts DN65 pipe diameter, 12 dosing branch pipes are uniformly distributed, and the dosing branch pipes adopt DN8 pipe diameter. The inner diameter of the inner cylinder is 980mm, the height is 2500mm, the inner diameter of the outer cylinder is 1600mm, and the height is 1400mm. The rising flow velocity of the inner cylinder after spraying jet flow water can reach more than 90m/h, thus the fluidization condition of most particles can be met, the height of a bed layer is ensured, the chemical agent, raw water and seed crystal particles have sufficient contact reaction time, the rising flow velocity of the top end of the inner cylinder is below 30m/h and is far lower than the critical fluidization velocity, and therefore the particles cannot rise along with water flow in the area and cannot be brought into the annular overflow groove. The overflow groove has the width of 250mm and the depth of 200mm, the inner diameter of the overflow port of the outer cylinder is 1100mm, and the ascending flow rate at the overflow port of the outer cylinder reaches 78m/h.

The foregoing has outlined the principles and embodiments of the present application with the understanding that the present application is directed to a method and core idea of the present application. It should be noted that it would be obvious to those skilled in the art that various improvements and modifications can be made to the present application without departing from the principles of the present application, and such improvements and modifications fall within the scope of the claims of the present application.

Claims (10)

1. The utility model provides a chemical crystallization forced circulation granulation fluidized bed water treatment facilities, water treatment facilities includes urceolus (10), inner tube (20) and both ends open cyclic annular cavity (30), cyclic annular cavity (30) form be in between the section of thick bamboo lateral wall of inner tube (20) with the section of thick bamboo lateral wall of urceolus (10), a serial communication port, water treatment facilities includes jet opening (A), jet opening (A) with the bottom region intercommunication of cyclic annular cavity (30), jet opening (A) slope sets up, in order to pass through jet opening (A) inwards and downward water spray towards the bottom open department of cyclic annular cavity (30) to one side.

2. The chemical crystallization forced circulation granulation fluidized bed water treatment device according to claim 1, characterized in that the water treatment device comprises a bottom cylinder (40), the bottom cylinder (40) is located in a bottom area of the outer cylinder (10) and located at a bottom side of the inner cylinder (20), and a cylinder side wall inner diameter of the bottom cylinder (40) is smaller than a cylinder side wall inner diameter of the inner cylinder (20).

3. The chemical crystallization forced circulation granulation fluidized bed water treatment device according to claim 2, characterized in that the water treatment device comprises an annular conical plate (50), the top end of the cylinder side wall of the bottom cylinder (40) is connected with the cylinder side wall of the outer cylinder (10) through the annular conical plate (50), an annular gap (B) for jet flow to pass through is formed between the annular conical plate (50) and the bottom end of the cylinder side wall of the inner cylinder (20), the annular conical plate (50) is provided with an annular step surface (50 a), the top end of the annular step surface (50 a) is inclined inwards relative to the bottom end, and the jet port (a) is arranged on the annular step surface (50 a).

4. A chemical crystallization forced circulation granulation fluidized bed water treatment device according to claim 3, characterized in that the water treatment device comprises a jet water chamber (60), a circulation line (70) and a water production pump (80); the jet water cavity (60) is communicated with the jet port (A), the jet water cavity (60) is positioned in the outer cylinder (10) and is formed by enclosing the side wall of the outer cylinder (10) and the annular conical plate (50); the circulating pipeline (70) is used for introducing part of produced water of the water treatment device into the jet water cavity (60), and the produced water pump (80) is connected to the circulating pipeline (70).

5. The apparatus according to claim 4, characterized in that it comprises a throttling element (90), the inlet of said throttling element (90) being in communication with said circulation line (70) and the outlet being the water outlet of said apparatus.

6. The chemical crystallization forced circulation granulation fluidized bed water treatment device according to claim 4, characterized in that the water treatment device comprises a buffer cavity (110) and an annular partition plate (120), the buffer cavity (110) is located in the outer cylinder (10), the annular partition plate (120) separates the jet water cavity (60) and the buffer cavity (110), the cylinder wall of the outer cylinder (10), the cylinder side wall of the bottom cylinder (40) and the annular partition plate (120) participate in enclosing to form the buffer cavity (110), and the circulation pipeline (70) is communicated with the jet water cavity (60) and the buffer cavity (110).

7. A chemical crystallization forced circulation granulation fluidized bed water treatment device according to any of the claims 1-6, characterized in that the water treatment device comprises a water inlet assembly (130), the water inlet assembly (130) comprises a water inlet spray pipe (131), the water inlet spray pipe (131) is located in the bottom area of the outer cylinder (10), and a water spray port (C) is arranged at the bottom end of the water inlet spray pipe (131).

8. The fluid bed water treatment device for chemical crystallization forced circulation granulation according to any one of claims 1-6, characterized in that the water treatment device comprises an annular overflow trough (140), the annular overflow trough (140) being located in the top area of the outer cylinder (10).

9. The chemical crystallization forced circulation granulation fluidized bed water treatment device according to any one of claims 3 to 6, wherein the water treatment device comprises a dosing assembly (160), the dosing assembly (160) comprises an annular dosing manifold (161) encircling the outer cylinder (10) and a plurality of dosing branch pipes (162) which are sequentially arranged at intervals along the circumferential direction, the outer ends of the dosing branch pipes (162) are communicated with the annular dosing manifold (161), the dosing branch pipes (162) are penetrated into through holes on the annular step surface (50 a), the inner ends of the dosing branch pipes (162) are provided with a dosing port (D), the dosing port (D) is arranged adjacent to the dosing port (a), the dosing port (D) is communicated with the bottom area of the annular cavity (30), and the dosing port (D) is obliquely arranged so as to spray medicament through the dosing port (D) obliquely inwards and obliquely downwards at the bottom end opening of the annular cavity (30).

10. The chemical crystallization forced circulation granulation fluidized bed water treatment device according to any one of claims 1 to 6, wherein the water treatment device comprises a seed crystal feeding assembly, the seed crystal feeding assembly comprises a feeding pipe (190), a feeding port (190 a) is arranged at the top end of the feeding pipe (190), a discharging port (190 b) is arranged at the bottom end of the feeding pipe, the feeding port (190 a) is positioned above an overflow port of the outer cylinder (10), and the discharging port (190 b) is positioned below an overflow port of the outer cylinder (10) and above an overflow port of the inner cylinder (20).