Forced circulation softening granulation suspended bed

Abstract

The invention discloses a forced circulation softening granulation suspended bed, and belongs to the field of water treatment.The forced circulation softening granulation suspended bed comprises an outer cylinder, a feeding assembly and a particle discharging part are arranged at the bottom of an inner cavity of the outer cylinder, a sampling pipe is arranged on one side of the outer cylinder, and a circulation assembly is arranged on the side, away from the sampling pipe, of the outer cylinder; an upper flow guide cover and a lower flow guide cover are arranged in the middle of an inner cavity of the outer cylinder, a reinforced separation baffle is arranged in the inner cavity of the outer cylinder and located below the water production ring pipe, and an exhaust valve is arranged at the top of the outer cylinder; a seed crystal circulation long inner cylinder is omitted, forced circulation power is provided for water production internal circulation through arrangement and design of a water cap, a flow guide cover is arranged to strengthen circulation mixing, dynamic change and flow state forms of seed crystals are met, and the device has the advantages of being free of seed crystal blocking, multi-layer circulation, sufficient in mixing, free of fine seed crystal carrying, capable of preventing agents from flowing backwards, capable of increasing descaling backwashing and water circulation utilization and the like. A dosing port, a water inlet and seed crystal dosing are performed at the same position, water discharged from a water cap is inclined downwards and is efficiently mixed with medicine discharged from a dosing head in a hedging manner, and the crystallization reaction efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of water treatment, and in particular relates to a forced circulation softening granulation suspension bed. Background Art

[0002] In industrial production, the industrial circulating cooling water system plays a vital role. However, during the operation of the system, it faces a series of problems. Due to the continuous evaporation, the water is constantly concentrated. In this process, the concentration of calcium, magnesium, carbonate ions, etc. in the water gradually increases. As the concentration of these ions continues to increase, the water quality begins to deteriorate. On the one hand, the deterioration of water quality will affect the entire industrial production process and product quality; on the other hand, the increase in salt concentration will bring more serious consequences. When the salt concentration reaches a certain level, scale and salt scale will gradually form on the pipe wall and equipment surface. These scales and salt scales will not only reduce the heat transfer efficiency of pipelines and equipment and increase energy consumption, but may also cause pipeline blockage, equipment damage and other problems, which will bring great troubles and serious consequences to industrial production. For this reason, a granulating fluidized bed is needed for water treatment.

[0003] However, the existing chemical crystallization forced circulation granulation fluidized bed water treatment device such as CN220564427U has the following problems: a seed circulation long inner cylinder is provided to realize the circulation disturbance direction of the seed, and the design of the circulation long inner cylinder only provides a guiding role in the vertical direction of the seed and the water flow, and even plays a limiting role in the dynamics of the water flow and the seed in the device. On the one hand, the seed particle size changes dynamically, and the internal flow state also changes. The fixed long inner cylinder is consistent with the flow state in the initial startup stage of the device, but as the seed crystal particles increase, the flow state will also change accordingly. The formed large particles are mixed and circulated with the fine seeds, reducing the rising space and reaction efficiency of the fine seeds in the long inner cylinder. On the other hand, the passage between the long inner cylinder and the outer wall is narrow, and the seeds with large crystal particle size will be blocked and stuck here, resulting in failure to operate normally. The contact positions of the three elements of the dosing, seed, and water are not concentrated, and the mixing degree is not high, which will form local precipitation and induce weak crystallization. At the same time, there is also a phenomenon that when large particles are mixed with fine particles and large particles are discharged, fine particles that have not completed nucleation are also discharged, resulting in a waste of seed crystals. Summary of the invention

[0004] The purpose of the present invention is to provide a forced circulation softening granulation suspension bed to solve the problem that a long inner cylinder with seed circulation can guide the disturbance direction of the seed circulation, but it will limit the water flow and seed dynamics, the flow state changes do not match with the increase of seed crystal particles, it is easy to be blocked and stuck, the contact and mixing of added drugs, seeds and incoming water are not concentrated and sufficient, and the mixing of large particles and fine particles is easy to lead to seed waste.

[0005] To achieve the above object, the present invention provides the following technical solution: a forced circulation softening granulation suspension bed, comprising an outer cylinder, a feeding assembly and a particle discharge member are arranged at the bottom of the inner cavity of the outer cylinder, a sampling tube is arranged on one side of the outer cylinder, and a circulation assembly is arranged on the side of the outer cylinder away from the sampling tube; An upper flow guide cover and a lower flow guide cover are arranged in the middle of the inner cavity of the outer cylinder, a strengthening separation baffle is arranged in the inner cavity of the outer cylinder below the water production ring pipe, and an exhaust valve is arranged on the top of the outer cylinder; The feed assembly comprises a water inlet inner cylinder, a sodium carbonate storage area, and an alkali storage area. The sodium carbonate storage area and the alkali storage area are both arranged in a water distribution and dosing plate. The inner walls of the water inlet inner cylinder and the outer cylinder surround a water outlet side buffer area. The inner cavity of the water inlet inner cylinder is arranged as a funnel-shaped hollow groove. A side water inlet piece is arranged at the inclined part of the hollow groove. The water distribution and dosing plate separates the bottom of the inner cavity of the outer cylinder into a main water outlet buffer area. The water distribution and dosing plate is provided with a plurality of main water inlet parts, which extend from bottom to top through the sodium carbonate storage area and the alkali storage area into the water inlet area of ​​the water inlet inner cylinder, and the bottom of the main water inlet part is connected with the main incoming water buffer area, and the top of the sodium carbonate storage area is provided with a plurality of sodium carbonate dosing heads, which extend from bottom to top through the alkali storage area into the water inlet area of ​​the water inlet inner cylinder, and the top of the alkali storage area is provided with a plurality of alkali dosing heads; The main water inlet is higher than the sodium carbonate dosing head and the alkali dosing head. A water baffle is arranged on the top of the main water inlet. The sodium carbonate dosing head, the alkali dosing head and the main water inlet are arranged in a staggered layout.

[0006] Furthermore, the outer walls of the upper and lower air guide covers are connected to the inner wall of the outer tube through fixing rods, and both the upper and lower air guide covers are hollow truncated cone structures that are narrow at the top and wide at the bottom, and the upper opening diameter of the lower air guide cover is consistent with the lower opening diameter of the upper air guide cover.

[0007] Furthermore, the sodium carbonate storage area and the alkali storage area are arranged up and down, and the side wall of the water distribution and dosing plate is connected to the inner wall of the water inlet inner cylinder.

[0008] Furthermore, the sodium carbonate dosing port of the sodium carbonate storage area and the alkali dosing port of the alkali storage area extend out of the outer cylinder through connecting pipes.

[0009] Furthermore, the main water inlet is made of steel wire with a gap of less than 200 microns, and the outlet area of ​​each main water inlet is not higher than 30 mm 2 .

[0010] Furthermore, the sodium carbonate dosing head and the alkali dosing head are staggered around the main water inlet, and the sodium carbonate dosing head is surrounded by the main water inlet and the alkali dosing head, and the alkali dosing head is also surrounded by the main water inlet and the sodium carbonate dosing head.

[0011] Furthermore, a sealing ball is arranged inside the main water inlet member, and the sealing ball can block the water inlet of the main water inlet member under the action of gravity.

[0012] Furthermore, the particle discharge component includes a particle discharge ring pipe and a particle discharge connecting pipe. There are multiple particle discharge connecting pipes, and the multiple particle discharge connecting pipes are rotationally symmetrically arranged on the inner wall of the inner ring of the particle discharge ring pipe. The particle discharge connecting pipe passes through the outer cylinder and the water inlet inner cylinder and extends into the water inlet inner cylinder, and is arranged close to the water distribution and dosing plate.

[0013] Furthermore, the circulation component includes a water production ring pipe, a backwash water pipe, a water production pool, and a circulation pump. The water production ring pipe is arranged at the top of the inner cavity of the outer cylinder. A plurality of water inlet holes are arranged above the water production ring pipe. The end of the water production ring pipe extends out of the outer cylinder and is connected to the backwash water pipe and the circulation pipe. The bottom port of the backwash water pipe is connected to the water inlet pipe, and the bottom port of the water inlet pipe is connected to the inlet of the main incoming water buffer area. The circulation pipe can be connected to the water production pool through a valve, and the liquid in the water production pool can enter the incoming water side buffer area through the circulation pump.

[0014] Furthermore, a glass tube sight glass is provided on the vertical pipe of the sampling tube, a first water outlet and a second water outlet are provided at a lower position of the sampling tube, and a sampling trough is provided below the second water outlet.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The forced circulation softening granulation suspended bed eliminates the long inner cylinder for seed circulation, provides forced circulation power through the water cap arrangement design for the internal circulation of produced water, and sets a guide cover to enhance circulation mixing, which conforms to the dynamic change and flow form of the seed, and has the advantages of no seed blockage, multi-layer circulation, sufficient mixing, no fine seed carryover, prevention of chemical backflow, increased descaling backwashing and water recycling, etc. The dosing port, water inlet and seed are added at the same place, and the water outlet of the water cap is inclined downward to hedge and efficiently mix with the drug outlet of the dosing head, thereby improving the efficiency of the crystallization reaction.

[0016] The forced circulation softening granulation suspension bed is equipped with a double-layer guide cover, which can enhance the rising intensity of the water flow in the center of the device, increase the chance of collision with the seed crystal, prolong the mixing time of the seed crystal at medium and high water levels, make the seed crystal fully contact with the ions in the water, improve the crystal growth environment, make large particles turn out and fall in advance, match the dynamic changes of the seed crystal size and the flow state, realize the layered treatment of large particles and fine particles, reduce the blockage of seed crystal particles and the discharge of incompletely formed fine seeds, and reduce the loss and waste of unnucleated seeds.

[0017] The forced circulation softening granulation suspension bed is designed with a reinforced separation baffle and a built-in water production ring pipe in the device, so that the produced water can be discharged without carrying crystal seeds to avoid affecting the subsequent treatment system; The forced circulation softening granulation suspension bed is equipped with acid backwashing and descaling. The hydrochloric acid pipeline is connected to the branch of the water pipeline for backwashing to avoid scaling at the outlet of the water distribution and dosing head and the dead corner area in the device during long-term operation, which affects the overall operation performance of the device. The forced circulation softening granulation suspension bed has a staggered arrangement of the dosing head and the main water inlet, which increases the contact area and contact opportunity between the reagent and water, and is beneficial to the rapid and uniform mixing of sodium carbonate, alkali and water, thereby improving the efficiency of the crystallization reaction; at the same time, the water flow can better flush the dead corners where the water dosing plate, the main water inlet and the dosing head are connected, avoiding the accumulation of crystal seeds in these dead corners due to uneven mixing of reagents or poor water flow, thereby reducing the possibility of scaling and ensuring the normal operation and service life of the device.

[0018] The forced circulation softening granulation suspended bed is provided with an internal circulation of produced water. The produced water enters the buffer area on the water side through a circulation pump and enters the device through a water cap in the buffer area on the water side. Through the water inlet flow direction and structural design, the rising intensity of the water flow in the center of the fluidized bed is strengthened, and the water flow velocity around is weakened, thereby forcing the formation of an internal water circulation. In addition, the internal circulation of produced water can stabilize the rising flow velocity and granulation effect in the device, avoiding the impact of unstable incoming water volume on the operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of a forced circulation softening granulation suspension bed; Figure 2 for Figure 1 A top view of the middle water dosing tray; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a cross-sectional view of the main water inlet on the water distribution and dosing tray.

[0020] In the figure: 10, outer cylinder; 110, upper guide cover; 120, lower guide cover; 130, enhanced separation baffle; 140, exhaust valve; 150, seed injection port; 160, drainage ditch; 20, feed assembly; 201, incoming water side buffer area; 2011, side water inlet; 202, incoming water main buffer area; 210, water inlet inner cylinder; 2101, water inlet area; 220, sodium carbonate storage area; 221, sodium carbonate dosing head; 222, sodium carbonate dosing port; 230, alkali storage area; 231, alkali dosing head; 232, alkali dosing port; 240, water distribution Dosing plate; 241, main water inlet; 2411, sealing ball; 2412, water baffle; 250, fixing rod; 310, water production ring pipe; 3201, backwash water pipe; 3202, water inlet pipe; 321, hydrochloric acid dosing port; 322, circulation pipe; 330, water production tank; 340, circulation pump; 350, raw water pump; 40, sampling tube; 401, first water outlet; 402, second water outlet; 410, glass tube sight glass; 420, sampling trough; 50, particle discharge part; 510, particle discharge ring pipe; 520, particle discharge connecting pipe. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the embodiments.

[0022] The following examples are used to illustrate the present invention, but they cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions. Simple improvements to the method of the present invention under the premise of the concept of the present invention belong to the scope of protection claimed in the present invention.

[0023] See also Figure 1-4 The present invention provides a forced circulation softening granulation suspension bed, comprising an outer cylinder 10, wherein a feeding assembly 20 and a particle discharge member 50 are arranged at the bottom of the inner cavity of the outer cylinder 10, a sampling tube 40 is arranged on one side of the outer cylinder 10, and a circulation assembly is arranged on the side of the outer cylinder 10 away from the sampling tube 40.

[0024] An upper flow guide cover 110 and a lower flow guide cover 120 are arranged in the middle of the inner cavity of the outer cylinder 10 , a reinforced separation baffle 130 is arranged below the water production ring pipe 310 in the inner cavity of the outer cylinder 10 , and an exhaust valve 140 is arranged at the top of the outer cylinder 10 .

[0025] The outer walls of the upper and lower flow guide covers 110 and 120 are connected to the inner wall of the outer cylinder 10 through the fixing rods 250. The upper and lower flow guide covers 110 and 120 are both hollow truncated cone structures that are narrow at the top and wide at the bottom. The rising water flows sequentially through the lower flow guide cover 120 and the upper flow guide cover 110 located in the middle of the water treatment device. The centers of the two are aligned and vertical. The lower flow guide cover 120 is located below the upper flow guide cover 110. The caliber of the lower flow guide cover 120 is larger than that of the upper flow guide cover 110. The upper caliber of the lower flow guide cover 120 is consistent with the lower caliber of the upper flow guide cover 110. Due to the wide inlet and narrow outlet, the lower guide cover 120 and the upper guide cover 110 increase the rising flow rate in the center in turn, and also perform low-level circulation and tumbling and falling for larger particles, while the fine particles that have not been fully formed continue to rise to the outlet of the upper guide cover 110 and tumble and fall, thereby forming a stratification of coarse particles and fine particles. When the central flow water rises to the upper outlet of the upper guide cover 110, it is influenced by the diversion of the enhanced separation baffle 130 and the gravity of the crystal seeds themselves, and spreads out and falls in all directions. The descending crystal seeds pass through the outer walls of the upper guide cover 110 and the lower guide cover 120 in turn and collide, which increases the mixing of the fine crystal seeds and prolongs the residence time of the crystal seeds at the medium and high liquid levels.

[0026] The feed assembly 20 includes a water inlet inner cylinder 210, a sodium carbonate storage area 220, and an alkali storage area 230. The sodium carbonate storage area 220 and the alkali storage area 230 are both arranged in a water distribution and dosing plate 240. The inner wall of the water inlet inner cylinder 210 and the outer cylinder 10 surround a water side buffer area 201. The inner cavity of the water inlet inner cylinder 210 is arranged as a funnel-shaped hollow groove, and a side water inlet member 2011 is arranged at the inclined part of the hollow groove. The water outlet direction of the side water inlet 2011 on the inclined part of the hollow groove is inclined upward. The annular arrangement of the side water inlet 2011 forms an inverted V-shaped water flow layer, and sprays the surrounding water close to the outer cylinder 10 toward the center. Combined with the upward water flow direction formed by the main water inlet 241, the water circulation phenomenon of "pouring out from the center and falling around" in the entire device is promoted.

[0027] The sodium carbonate storage area 220 and the alkali storage area 230 are arranged up and down, the side wall of the water distribution and dosing plate 240 is connected to the inner wall of the water inlet inner cylinder 210, and the water distribution and dosing plate 240 separates the bottom of the inner cavity of the outer cylinder 10 into the main water buffer area 202; A plurality of main water inlet parts 241 are arranged on the water distribution and dosing plate 240, and the main water inlet parts 241 pass through the sodium carbonate storage area 220 and the alkali storage area 230 from bottom to top and extend into the water inlet area 2101 of the water inlet inner cylinder 210, and the bottom of the main water inlet part 241 is connected with the main incoming water buffer area 202, and a plurality of sodium carbonate dosing heads 221 are arranged on the top of the sodium carbonate storage area 220, and a plurality of sodium carbonate dosing heads 221 pass through the alkali storage area 230 from bottom to top and extend into the water inlet area 2101 of the water inlet inner cylinder 210, and a plurality of alkali dosing heads 231 are arranged on the top of the alkali storage area 230.

[0028] The sodium carbonate dosing port 222 of the sodium carbonate storage area 220 and the alkali dosing port 232 of the alkali storage area 230 extend out of the outer cylinder 10 through connecting pipes, so as to facilitate adding reagents to the sodium carbonate storage area 220 and the alkali storage area 230 .

[0029] After entering the main water buffer area 202, the raw water enters the device through the main water inlet 241; the liquid inside the side water buffer area 201 enters the device through the side water inlet 2011. The sodium carbonate storage area 220 and the alkali storage area 230 enter the device through the sodium carbonate dosing head 221 and the alkali dosing head 231 respectively, and the sodium carbonate, alkali, seed crystals and water come into contact and undergo a crystallization reaction.

[0030] The main water inlet 241 is made of steel wire winding, with a gap less than 200 microns, and the outlet area of ​​a single main water inlet 241 is not higher than 30 mm2. The sodium carbonate dosing head 221 and the alkali dosing head 231 use atomizing nozzles made of 1Cr18Ni9Ti.

[0031] See also Figure 1 and Figure 4 The main water inlet 241 is higher than the sodium carbonate dosing head 221 and the alkali dosing head 231. The main water inlet 241 and the side water inlet 2011 are both provided with water baffles 2412 on their tops. The water outflow from the main water inlet 241 flushes toward the water distribution and dosing tray 240, the sodium carbonate dosing head 221 and the alkali dosing head 231, which not only mixes the reagents, but also prevents the accumulation of crystal seeds and scaling at the dead corners where the water distribution and dosing tray 240, the main water inlet 241 and the dosing head are connected.

[0032] See also Figure 1 , Figure 2 and Figure 3 The sodium carbonate dosing head 221, the alkali dosing head 231 and the main water inlet 241 are arranged in a staggered arrangement. The sodium carbonate dosing head 221 and the alkali dosing head 231 are staggered around the main water inlet 241, and the sodium carbonate dosing head 221 is surrounded by the main water inlet 241 and the alkali dosing head 231, and the alkali dosing head 231 is also surrounded by the main water inlet 241 and the sodium carbonate dosing head 221. When raw water enters the device through the main water inlet 241, the outlet water flow of the main water inlet 241 flushes the water distribution and dosing plate 240, the sodium carbonate dosing head 221 and the alkali dosing head 231, and the sodium carbonate and alkali enter from their respective dosing heads. This staggered arrangement increases the contact area and contact opportunity between the reagents and water, which is beneficial to the rapid and uniform mixing of sodium carbonate, alkali and water, thereby improving the efficiency of the crystallization reaction; at the same time, the water flow can better flush the dead corners where the water distribution and dosing plate 240 and the main water inlet 241 and the dosing head are connected, avoiding the accumulation of crystal seeds in these dead corners due to uneven reagent mixing or poor water flow, thereby reducing the possibility of scaling and ensuring the normal operation and service life of the device.

[0033] A sealing ball 2411 is arranged inside the main water inlet member 241. The sealing ball 2411 can block the water inlet of the main water inlet member 241 under the action of gravity. The main water inlet member 241 and the side water inlet member 2011 can adopt the same structure.

[0034] The particle discharge component 50 includes a particle discharge annular pipe 510 and a particle discharge connecting pipe 520. There are multiple particle discharge connecting pipes 520, and the multiple particle discharge connecting pipes 520 are rotationally symmetrically arranged on the inner wall of the inner ring of the particle discharge annular pipe 510. The particle discharge connecting pipe 520 passes through the outer cylinder 10 and the water inlet inner cylinder 210 and extends into the water inlet inner cylinder 210, and is arranged close to the water distribution and dosing plate 240. After running for a period of time, when the crystal seeds have completed forming particles, the valve on the particle discharge annular pipe 510 is opened to collect the particle discharge, and the collected particles can be selected for outsourcing processing.

[0035] The circulation component includes a water production ring pipe 310, a backwash water pipe 3201, a water production pool 330, and a circulation pump 340. The water production ring pipe 310 is arranged at the top of the inner cavity of the outer cylinder 10. A plurality of water inlet holes are arranged above the water production ring pipe 310. The multi-hole water production design of the water production ring pipe 310 has a smaller impact force than the single-pipe water production water flow. The end of the water production ring pipe 310 extends out of the outer cylinder 10 and can be connected to the backwash water pipe 3201 and the circulation pipe 322. The bottom port of the backwash water pipe 3201 is connected to the water inlet pipe 3202, and the bottom port of the water inlet pipe 3202 is connected to the inlet of the incoming water main buffer area 202. The circulation pipe 322 can be connected to the water production pool 330 through a valve, and the liquid in the water production pool 330 can enter the incoming water side buffer area 201 through the circulation pump 340.

[0036] A hydrochloric acid dosing port 321 is provided on the backwash water pipe 3201, and the cleaning water passes through the raw water pump 350, the hydrochloric acid dosing port 321, and the overflow water ring pipe 310 into the device for descaling and cleaning.

[0037] A glass tube sight glass 410 is provided on the vertical pipe of the sampling tube 40, and a first water outlet 401 and a second water outlet 402 are provided at the lower position of the sampling tube 40. A sampling slot 420 is provided below the second water outlet 402, and the valve at the second water outlet 402 can be opened briefly to take crystal seeds and water samples for observation and detection.

[0038] The working principle of the present invention is as follows: the crystal seeds are added into the device from the crystal seed adding port 150, and then the raw water is transported to the incoming water main buffer area 202 through the water inlet pipe 3202 by the raw water pump 350, and then enters the water inlet area 2101 through the main water inlet part 241 on the water distribution and dosing tray 240; the produced water in the water production pool 330 enters the incoming water side buffer area 201 through the circulation pump 340, and then the produced water enters the water inlet area 2101 through the side water inlet part 2011. The reagents in the sodium carbonate storage area 220 and the alkali storage area 230 enter the device through the sodium carbonate dosing head 221 and the alkali dosing head 231 on the water distribution and dosing tray 240 respectively; the sodium carbonate, alkali, crystal seeds and water contact and crystallization reaction occurs.

[0039] The rising water flow passes through the upper guide cover 110 and the lower guide cover 120 located in the middle of the water treatment device in turn. Due to the wide inlet and narrow outlet, the lower guide cover 120 and the upper guide cover 110 increase the rising flow rate in the center in turn, and also cause the larger particles to tumble and fall in a low-level circulation, while the fine particles that have not been completely formed continue to rise to the outlet of the upper guide cover 110 and tumble and fall, thereby forming a stratification of coarse particles and fine particles. When the central flow water rises to the upper outlet of the upper guide cover 110, it is influenced by the diversion of the enhanced separation baffle 130 and the gravity of the crystal seeds themselves, and spreads out and descends. The descending crystal seeds pass through the outer walls of the upper guide cover 110 and the lower guide cover 120 in turn and collide, which increases the mixing of the fine crystal seeds and prolongs the residence time of the crystal seeds at the medium and high liquid levels.

[0040] The rising water flows through the enhanced separation baffle 130 and enters the water production ring pipe 310. The water in the water production ring pipe 310 enters the water production pool 330 or the inlet of the main water buffer area 202 through the backwash water pipe 3201. After running for a period of time, the valve on the particle discharge ring pipe 510 is opened to collect the particle discharge, so that the particles inside the water inlet area 2101 enter the particle discharge ring pipe 510 through the particle discharge connecting pipe 520 and are discharged. The collected particles can be outsourced for treatment.

[0041] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the embodiments of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description, and these obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A forced circulation softening granulation suspension bed, characterized in that: It comprises an outer cylinder (10), wherein a feeding assembly (20) and a particle discharge member (50) are arranged at the bottom of the inner cavity of the outer cylinder (10), a sampling tube (40) is arranged on one side of the outer cylinder (10), and a circulation assembly is arranged on the side of the outer cylinder (10) away from the sampling tube (40); An upper flow guide cover (110) and a lower flow guide cover (120) are arranged in the middle of the inner cavity of the outer cylinder (10); a reinforced separation baffle (130) is arranged in the inner cavity of the outer cylinder (10) below the water production ring pipe (310); and an exhaust valve (140) is arranged at the top of the outer cylinder (10); The feed assembly (20) comprises a water inlet inner cylinder (210), a sodium carbonate storage area (220), and an alkali storage area (230); the sodium carbonate storage area (220) and the alkali storage area (230) are both arranged in a water distribution and dosing plate (240); the inner wall of the water inlet inner cylinder (210) and the outer cylinder (10) enclose an outflow side buffer area (201); the inner cavity of the water inlet inner cylinder (210) is arranged as a funnel-shaped hollow groove; a side water inlet member (211) is arranged at an inclined portion of the hollow groove; and the water distribution and dosing plate (240) separates the bottom of the inner cavity of the outer cylinder (10) into an outflow main buffer area (202); The water distribution and dosing plate (240) is provided with a plurality of main water inlet parts (241), the main water inlet parts (241) pass through the sodium carbonate storage area (220) and the alkali storage area (230) from bottom to top and extend into the water inlet area (2101) of the water inlet inner cylinder (210), the bottom of the main water inlet part (241) is connected to the incoming water main buffer area (202), the top of the sodium carbonate storage area (220) is provided with a plurality of sodium carbonate dosing heads (221), the plurality of sodium carbonate dosing heads (221) pass through the alkali storage area (230) from bottom to top and extend into the water inlet area (2101) of the water inlet inner cylinder (210), the top of the alkali storage area (230) is provided with a plurality of alkali dosing heads (231); The main water inlet (241) is higher than the sodium carbonate dosing head (221) and the alkali dosing head (231). A water baffle (2412) is provided on the top of the main water inlet (241). The sodium carbonate dosing head (221), the alkali dosing head (231) and the main water inlet (241) are arranged in a staggered arrangement.

2. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The outer walls of the upper air guide cover (110) and the lower air guide cover (120) are connected to the inner wall of the outer cylinder (10) via a fixing rod (250); the upper air guide cover (110) and the lower air guide cover (120) are both hollow truncated cone structures that are narrow at the top and wide at the bottom; the upper opening of the lower air guide cover (120) has the same diameter as the lower opening of the upper air guide cover (110).

3. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The sodium carbonate storage area (220) and the alkali storage area (230) are arranged vertically, and the side wall of the water distribution and dosing plate (240) is connected to the inner wall of the water inlet inner cylinder (210).

4. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The sodium carbonate dosing port (222) of the sodium carbonate storage area (220) and the alkali dosing port (232) of the alkali storage area (230) extend out of the outer cylinder (10) through connecting pipes.

5. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The main water inlet (241) is made of steel wire with a gap of less than 200 microns. The outlet area of ​​each main water inlet (241) is not more than 30 mm. 2 .

6. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The sodium carbonate dosing head (221) and the alkali dosing head (231) are arranged in an alternating manner around the main water inlet (241); at the same time, the sodium carbonate dosing head (221) is surrounded by the main water inlet (241) and the alkali dosing head (231); and the alkali dosing head (231) is also surrounded by the main water inlet (241) and the sodium carbonate dosing head (221).

7. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: A sealing ball (2411) is arranged inside the main water inlet component (241), and the sealing ball (2411) can block the water inlet of the main water inlet component (241) under the action of gravity.

8. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The particle discharge component (50) comprises a particle discharge annular tube (510) and a particle discharge connecting tube (520). A plurality of the particle discharge connecting tubes (520) are provided. The plurality of particle discharge connecting tubes (520) are rotationally symmetrically arranged in the inner wall of the inner ring of the particle discharge annular tube (510). The particle discharge connecting tube (520) passes through the outer tube (10) and the water inlet inner tube (210), extends into the water inlet inner tube (210), and is arranged close to the water distribution and dosing disk (240).

9. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The circulation assembly comprises a water production ring pipe (310), a backwash water pipe (3201), a water production pool (330), and a circulation pump (340). The water production ring pipe (310) is arranged at the top of the inner cavity of the outer cylinder (10). A plurality of water inlet holes are arranged above the water production ring pipe (310). The end of the water production ring pipe (310) extends out of the outer cylinder (10) and is connected to the backwash water pipe (3201) and the circulation pipe (322). The bottom port of the backwash water pipe (3201) is connected to the water inlet pipe (3202). The bottom port of the water inlet pipe (3202) is connected to the inlet of the incoming water main buffer area (202). The circulation pipe (322) can be connected to the water production pool (330) through a valve. Liquid in the water production pool (330) can enter the incoming water side buffer area (201) through the circulation pump (340).

10. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: A glass tube sight glass (410) is provided on the vertical pipe of the sampling tube (40), a first water outlet (401) and a second water outlet (402) are provided at a lower position of the sampling tube (40), and a sampling groove (420) is provided below the second water outlet (402).

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