Forced circulation softened prilling suspension bed

Abstract

This invention discloses a forced circulation softening granulation suspension bed, belonging to the field of water treatment. It includes an outer cylinder, with a feeding assembly and particle discharge device located at the bottom of the inner cavity of the outer cylinder. A sampling tube is located on one side of the outer cylinder, and a circulation assembly is located on the side of the outer cylinder away from the sampling tube. An upper and lower flow guide hood are located in the middle of the inner cavity of the outer cylinder. A reinforced separation baffle is located below the product water ring pipe in the inner cavity of the outer cylinder. An exhaust valve is located at the top of the outer cylinder. The long inner cylinder for seed crystal circulation is eliminated; a water cap arrangement design provides forced circulation power for the internal circulation of product water. The flow guide hood enhances circulation mixing, conforming to the dynamic changes and flow patterns of the seed crystals. It offers advantages such as no seed crystal jamming, multi-layer circulation, thorough mixing, no fine seed crystal carrying, prevention of chemical backflow, increased descaling backwashing, and water recycling. The chemical dosing port, water inlet, and seed crystal dosing are located at the same point. The water outlet of the water cap slopes downwards to counteract the chemical outlet of the dosing head for efficient mixing, improving the crystallization reaction efficiency.

Description

Technical Field

[0001] This invention belongs to the field of water treatment technology, specifically relating to a forced circulation softening granulation suspension bed. Background Technology

[0002] In industrial production, industrial circulating cooling water systems play a crucial role. However, these systems face a series of problems during operation. Due to continuous evaporation, water is constantly concentrated. During this process, the concentration of calcium and magnesium ions, carbonate ions, and other ions in the water gradually increases. As the concentration of these ions continues to rise, water quality begins to deteriorate. On the one hand, the deterioration of water quality affects the entire industrial production process and product quality; on the other hand, the increase in salt concentration has even more serious consequences. When the salt concentration reaches a certain level, scale and salt deposits gradually form on the pipe walls and equipment surfaces. These scale and salt deposits not only reduce the heat transfer efficiency of pipes and equipment and increase energy consumption, but may also lead to pipe blockage, equipment damage, and other problems, causing great trouble and serious consequences for industrial production. Therefore, granulation fluidized bed water treatment is necessary.

[0003] However, existing chemical crystallization forced circulation granulation fluidized bed water treatment devices, such as CN220564427U, have the following problems: They use a long inner cylinder for seed crystal circulation to guide the direction of seed crystal circulation disturbance. However, this long inner cylinder only provides guidance in the vertical direction between the seed crystals and the water flow, and may even restrict the dynamics of the water flow and seed crystals within the device. On the one hand, the size of the seed crystals is dynamically changing, and the internal flow pattern is also changing. While the fixed long inner cylinder matches the flow pattern during the initial start-up phase, as the seed crystals increase in size, the flow pattern changes accordingly. The mixing and circulation of large, already formed particles with fine seed crystals reduces the upward space and reaction efficiency of the fine seed crystals within the long inner cylinder. On the other hand, the narrow channel between the long inner cylinder and the outer wall can cause large-sized seed crystals to become blocked, preventing normal operation. Furthermore, the lack of concentrated contact points and insufficient mixing between the chemical dosing, seed crystals, and incoming water will lead to localized sedimentation and weak crystallization induction. Meanwhile, there is also the problem of large particles being mixed with fine particles, which leads to the discharge of fine particles that have not yet completed nucleation, resulting in the waste of seed crystals. Summary of the Invention

[0004] The purpose of this invention is to provide a forced circulation softening granulation suspension bed to solve the problems of having a long inner cylinder for seed circulation, which can guide the direction of seed circulation disturbance, but restricts water flow and seed dynamics, and the flow pattern changes with the increase of seed crystallization particles, which is not in line with the flow pattern, easily causing blockage and jamming, and the lack of concentrated contact and insufficient mixing of chemical addition, seed, and incoming water, and the easy waste of seed due to the mixing of large and fine particles.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a forced circulation softening granulation suspension bed, comprising an outer cylinder, wherein a feeding assembly and a particle discharge component are provided at the bottom of the inner cavity of the outer cylinder, a sampling tube is provided on one side of the outer cylinder, and a circulation assembly is provided on the side of the outer cylinder away from the sampling tube;

[0006] The outer cylinder is provided with an upper guide shroud and a lower guide shroud in the middle of its inner cavity. The outer cylinder is provided with a reinforced separation baffle located below the product water ring pipe. The outer cylinder is provided with an exhaust valve at its top.

[0007] The feeding assembly includes an inner water inlet cylinder, a sodium carbonate storage area, and an alkali storage area. Both the sodium carbonate storage area and the alkali storage area are located inside the water distribution and dosing tray. The inner walls of the inner water inlet cylinder and the outer cylinder enclose a water-side buffer area. The inner cavity of the inner water inlet cylinder is configured as a funnel-shaped hollow trough. A side water inlet is provided at the inclined part of the hollow trough. The water distribution and dosing tray separates the bottom of the inner cavity of the outer cylinder into a main water-side buffer area.

[0008] The water distribution and dosing tray is equipped with several main water inlets. The main water inlets extend from bottom to top through the sodium carbonate storage area and the alkali storage area into the water inlet area of ​​the inner water inlet cylinder. The bottom of the main water inlets is connected to the main buffer area of ​​the incoming water. Several sodium carbonate dosing heads are provided at the top of the sodium carbonate storage area. Several sodium carbonate dosing heads extend from bottom to top through the alkali storage area into the water inlet area of ​​the inner water inlet cylinder. Several alkali dosing heads are provided at the top of the alkali storage area.

[0009] The main water inlet is higher than the sodium carbonate dosing head and the alkali dosing head. A baffle is installed 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 an alternating pattern.

[0010] Furthermore, the outer walls of the upper and lower guide shields are connected to the inner wall of the outer cylinder by fixing rods. Both the upper and lower guide shields are hollow frustum-shaped structures that are narrow at the top and wide at the bottom. The upper opening diameter of the lower guide shield is the same as the lower opening diameter of the upper guide shield.

[0011] Furthermore, the sodium carbonate storage area and the alkali storage area are arranged vertically, and the side wall of the water distribution and dosing tray is connected to the inner wall of the water inlet cylinder.

[0012] Furthermore, the sodium carbonate dosing port in the sodium carbonate storage area and the alkali dosing port in the alkali storage area extend out of the outer cylinder via connecting pipes.

[0013] Furthermore, the main water inlet component is made of steel wire with a gap of less than 200 micrometers, and the outlet area of ​​each main water inlet component is no more than 30 mm². 2 .

[0014] Furthermore, the sodium carbonate dosing head and the alkali dosing head are distributed alternately around the main water inlet, while 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.

[0015] Furthermore, a sealing ball is provided inside the main water inlet component, which can block the water inlet of the main water inlet component under the action of gravity.

[0016] Furthermore, the particle discharge component includes a particle discharge ring pipe and a particle discharge connecting pipe. Multiple particle discharge connecting pipes are provided, and the multiple particle discharge connecting pipes are arranged symmetrically in the inner wall of the inner ring of the particle discharge ring pipe. The particle discharge connecting pipes pass through the outer cylinder and the water inlet inner cylinder and extend into the water inlet inner cylinder, and are located close to the water distribution and dosing plate.

[0017] Furthermore, the circulation assembly includes a product water ring pipe, a backwash water pipe, a product water tank, and a circulation pump. The product water ring pipe is located at the top of the inner cavity of the outer cylinder, and multiple water inlets are provided above the product water ring pipe. The end of the product water 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 buffer zone of incoming water. The circulation pipe can be connected to the product water tank through a valve, and the liquid in the product water tank can enter the buffer zone on the incoming water side through the circulation pump.

[0018] Furthermore, a glass tube sight glass is provided on the vertical pipe of the sampling tube, and a first water outlet and a second water outlet are provided at the lower position of the sampling tube, with a sampling trough provided below the second water outlet.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] This forced circulation softening granulation suspension bed eliminates the need for a long inner cylinder for seed crystal circulation. Forced circulation power is provided through an internal circulation system using a water cap arrangement. A flow guide enhances circulation mixing, conforming to the dynamic changes and flow patterns of the seed crystals. It offers advantages such as no seed crystal jamming, multi-layer circulation, thorough mixing, no fine seed crystal carryover, prevention of chemical backflow, increased descaling backwashing, and water recycling. The chemical dosing port, water inlet, and seed crystal addition point are all located at the same location. The water outlet from the water cap slopes downwards, effectively mixing with the chemical dosing head to improve crystallization reaction efficiency.

[0021] This forced circulation softening granulation suspension bed is equipped with a double-layer guide hood, which can increase the upward intensity of water flow in the center of the device, increase the chance of collision with the seed crystals, extend the mixing time of the seed crystals in the middle and high water levels, and allow the seed crystals to fully contact the ions in the water, improve the crystal growth environment, and cause large particles to turn over and fall earlier. It matches the dynamic changes in seed crystal size and flow state, realizes the stratified treatment of large and fine particles, reduces seed particle blockage and discharge of incompletely formed fine seed crystals, and reduces the loss and waste of unnucleated seed crystals.

[0022] This forced circulation softening granulation suspension bed is designed with enhanced separation baffles and built-in water production loop pipes to ensure that the water production does not carry seed crystals out and avoids impacting the subsequent treatment system.

[0023] This forced circulation softening granulation suspension bed is equipped with acid backwashing for descaling. Backwashing is performed by connecting the hydrochloric acid pipeline through a branch of the incoming water pipeline, which avoids the formation of scale in the water distribution and dosing head outlet and dead corner areas inside the device during long-term operation, thus preventing the overall operating performance of the device from being affected.

[0024] This forced circulation softening granulation suspension bed, with its staggered arrangement of the dosing head and main water inlet, increases the contact area and opportunities between the chemicals and water. This facilitates 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 away the dead corners between the dosing plate, the main water inlet, and the dosing head, preventing the accumulation of crystal seeds in these dead corners due to uneven chemical mixing or poor water flow. This reduces the possibility of scaling and ensures the normal operation and service life of the device.

[0025] This forced circulation softening granulation fluidized bed is equipped with an internal circulation system for the produced water. The produced water enters the inlet buffer zone through a circulation pump and then enters the device through the water cap in the inlet buffer zone. Through the design of the inlet flow direction and structure, the upward flow intensity of the water in the center of the fluidized bed is enhanced, while the flow velocity of the water around the perimeter is weakened, thereby forcing the formation of an internal water circulation. In addition, the internal circulation of the produced water can stabilize the upward flow velocity and granulation effect within the device, and prevent the device operation from being affected when the inlet water volume is unstable. Attached Figure Description

[0026] Figure 1 A three-dimensional view of a forced circulation softening granulation suspension bed;

[0027] Figure 2 for Figure 1 Top view of the water dosing tray in the middle of the cloth;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a cross-sectional view of the main water inlet component on the water distribution and chemical dosing tray.

[0030] In the diagram: 10. Outer cylinder; 110. Upper guide shroud; 120. Lower guide shroud; 130. Reinforced separation baffle; 140. Exhaust valve; 150. Seed crystal addition port; 160. Drainage ditch; 20. Feed assembly; 201. Inlet water side buffer zone; 2011. Side water inlet component; 202. Inlet water main buffer zone; 210. Inlet water inner cylinder; 2101. Inlet water 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 tray; 241, main water inlet; 2411, sealing ball; 2412, baffle plate; 250, fixing rod; 310, product water ring pipe; 3201, backwash water pipe; 3202, water inlet pipe; 321, hydrochloric acid dosing port; 322, circulation pipe; 330, product water tank; 340, circulation pump; 350, raw water pump; 40, sampling pipe; 401, first water outlet; 402, second water outlet; 410, glass tube sight glass; 420, sampling tank; 50, particulate discharge component; 510, particulate discharge ring pipe; 520, particulate discharge connecting pipe. Detailed Implementation

[0031] The present invention will be further described below with reference to embodiments.

[0032] The following embodiments are used to illustrate the present invention, but should not be used to limit the scope of protection of the present invention. The conditions in the embodiments can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0033] Please see Figure 1-4 The present invention provides a forced circulation softening granulation suspension bed, including an outer cylinder 10. The bottom of the inner cavity of the outer cylinder 10 is provided with a feeding assembly 20 and a particle discharge component 50. A sampling tube 40 is provided on one side of the outer cylinder 10, and a circulation assembly is provided on the side of the outer cylinder 10 away from the sampling tube 40.

[0034] The outer cylinder 10 has an upper guide shroud 110 and a lower guide shroud 120 in the middle of its inner cavity. The outer cylinder 10 has an enhanced separation baffle 130 located below the product water ring pipe 310 in its inner cavity. The outer cylinder 10 has an exhaust valve 140 at its top.

[0035] The outer walls of the upper guide shroud 110 and the lower guide shroud 120 are connected to the inner wall of the outer cylinder 10 by a fixing rod 250. Both the upper guide shroud 110 and the lower guide shroud 120 have a hollow frustum-shaped structure that is narrow at the top and wide at the bottom. The rising water flow passes through the lower guide shroud 120 and the upper guide shroud 110, which are located in the middle of the water treatment device, in sequence. The two are aligned at the center and perpendicular to each other. The lower guide shroud 120 is located below the upper guide shroud 110. The diameter of the lower guide shroud 120 is larger than that of the upper guide shroud 110. The upper diameter of the lower guide shroud 120 is the same as the lower diameter of the upper guide shroud 110.

[0036] Because of the wide inlet and narrow outlet, the lower guide shroud 120 and the upper guide shroud 110 successively increase the upward flow velocity at the center. At the same time, larger particles are circulated and tumbled at a low level, while fine particles that have not fully formed continue to rise to the outlet of the upper guide shroud 110 and tumble down, thus forming a stratification of coarse and fine particles. When the central water rises to the upper outlet of the upper guide shroud 110, it is guided by the enhanced separation baffle 130 and influenced by the gravity of the crystal seeds themselves, and disperses and descends in all directions. The descending crystal seeds pass through the outer walls of the upper guide shroud 110 and the lower guide shroud 120 in turn and collide with each other, which increases the mixing of fine crystal seeds and prolongs the residence time of crystal seeds in the middle and high liquid levels.

[0037] The feeding assembly 20 includes an inner water inlet 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 located inside the water distribution and dosing tray 240. The inner walls of the inner water inlet cylinder 210 and the outer cylinder 10 enclose a water-side buffer area 201. The inner cavity of the inner water inlet cylinder 210 is configured as a funnel-shaped hollow trough, and a side water inlet component 2011 is provided at the inclined part of the hollow trough.

[0038] The side water inlet 2011 on the inclined part of the hollow groove has an inward and upward water outlet direction. The annular arrangement of the side water inlet 2011 forms an inverted V-shaped water flow layer, which sprays the water near the outer cylinder 10 towards the center. Combined with the upward water flow formed by the main water inlet 241, it promotes the "center gushing out and surrounding area falling" circulation phenomenon of water in the whole device.

[0039] Sodium carbonate storage area 220 and alkali storage area 230 are arranged one above the other. The side wall of water distribution and dosing plate 240 is connected to the inner wall of water inlet inner cylinder 210. Water distribution and dosing plate 240 separates the bottom of the inner cavity of outer cylinder 10 into water main buffer area 202.

[0040] The water distribution and dosing tray 240 is equipped with several main water inlets 241. The main water inlets 241 extend from bottom to top through the sodium carbonate storage area 220 and the alkali storage area 230 into the water inlet area 2101 of the water inlet cylinder 210. The bottom of the main water inlets 241 is connected to the main incoming water buffer area 202. Several sodium carbonate dosing heads 221 are provided at the top of the sodium carbonate storage area 220. The several sodium carbonate dosing heads 221 extend from bottom to top through the alkali storage area 230 into the water inlet area 2101 of the water inlet cylinder 210. Several alkali dosing heads 231 are provided at the top of the alkali storage area 230.

[0041] 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, which facilitates the addition of reagents to the sodium carbonate storage area 220 and the alkali storage area 230.

[0042] Raw water enters the main inlet buffer zone 202 and then enters the device through the main inlet 241; liquid inside the inlet side buffer zone 201 enters the device through the side inlet 2011. Sodium carbonate storage zone 220 and alkali storage zone 230 enter the device through sodium carbonate dosing head 221 and alkali dosing head 231, respectively, where sodium carbonate, alkali, seed crystals, and water come into contact and undergo a crystallization reaction.

[0043] The main water inlet 241 is made of steel wire with a gap of less than 200 micrometers. The outlet area of ​​a single main water inlet 241 is no more than 30 mm2. The sodium carbonate dosing head 221 and the alkali dosing head 231 are atomizing nozzles made of 1Cr18Ni9Ti material.

[0044] Please see 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. Both the main water inlet 241 and the side water inlet 2011 are equipped with baffles 2412. The water flowing out of the main water inlet 241 flows towards the water distribution dosing plate 240, the sodium carbonate dosing head 221 and the alkali dosing head 231, which not only mixes the chemicals but also prevents the accumulation of crystals and scaling at the dead corners where the water distribution dosing plate 240 connects with the main water inlet 241 and the dosing heads.

[0045] Please see 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 an alternating layout. Specifically, the sodium carbonate dosing head 221 and the alkali dosing head 231 are distributed around the main water inlet 241, while the sodium carbonate dosing head 221 is surrounded by both the main water inlet 241 and the alkali dosing head 231, and vice versa. When raw water enters the device through the main inlet 241, the water flow from the main inlet 241 sprays towards the water distribution dosing tray 240, the sodium carbonate dosing head 221, and the alkali dosing head 231. Sodium carbonate and alkali enter from their respective dosing heads. This staggered arrangement increases the contact area and contact opportunities between the chemicals and water, which is conducive 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 dosing tray 240 connects to the main inlet 241 and the dosing heads, avoiding the accumulation of crystal seeds in these dead corners due to uneven chemical mixing or poor water flow, thus reducing the possibility of scaling and ensuring the normal operation and service life of the device.

[0046] The main water inlet 241 is equipped with a sealing ball 2411. Under the action of gravity, the sealing ball 2411 can block the water inlet of the main water inlet 241. The main water inlet 241 and the side water inlet 2011 can adopt the same structure.

[0047] The particle discharge component 50 includes a particle discharge ring pipe 510 and a particle discharge connecting pipe 520. Multiple particle discharge connecting pipes 520 are provided and are arranged symmetrically in the inner wall of the inner ring of the particle discharge ring pipe 510. The particle discharge connecting pipes 520 pass through the outer cylinder 10 and the water inlet inner cylinder 210 and extend into the water inlet inner cylinder 210, and are located near the water distribution and dosing plate 240. After a period of operation, when the seed crystals have formed particles, the valve on the particle discharge ring pipe 510 is opened to discharge and collect the particles. The collected particles can be selected for outsourced treatment.

[0048] The circulation assembly includes a water production ring pipe 310, a backwash water pipe 3201, a water production tank 330, and a circulation pump 340. The water production ring pipe 310 is located at the top of the inner cavity of the outer cylinder 10. Multiple water inlets are provided above the water production ring pipe 310. The multi-hole water production design of the water production ring pipe 310 results in less impact force compared to the water flow from a single pipe. The end of the water production ring pipe 310 extends outside 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. The bottom port of the water inlet pipe 3202 is connected to the inlet of the main water buffer zone 202. The circulation pipe 322 can be connected to the water production tank 330 through a valve. The liquid in the water production tank 330 can enter the water-side buffer zone 201 through the circulation pump 340.

[0049] A hydrochloric acid dosing port 321 is installed on the backwash water pipe 3201. The cleaning water enters the device through the raw water pump 350, the hydrochloric acid dosing port 321, and the overflow product water ring pipe 310 for descaling and cleaning.

[0050] The vertical pipe of the sampling tube 40 is equipped with a glass tube sight glass 410. The sampling tube 40 has a first water outlet 401 and a second water outlet 402 at its lower position. A sampling trough 420 is provided below the second water outlet 402. The valve at the second water outlet 402 can be opened briefly to take crystal seeds and water samples for observation and testing.

[0051] The working principle of this invention: Seed crystals are added into the device through seed crystal inlet 150. Raw water is then pumped by raw water pump 350 through inlet pipe 3202 to the main water buffer zone 202, and then enters the inlet zone 2101 through the main water inlet 241 on the water distribution and dosing tray 240. Product water from the product water tank 330 enters the incoming water buffer zone 201 through circulation pump 340, and then enters the inlet zone 2101 through the side water inlet 2011. The reagents in the sodium carbonate storage zone 220 and alkali storage zone 230 enter the device through sodium carbonate dosing head 221 and alkali dosing head 231 on the water distribution and dosing tray 240, respectively. Sodium carbonate, alkali, seed crystals, and water come into contact and undergo a crystallization reaction.

[0052] The rising water flow passes sequentially through the upper guide shroud 110 and the lower guide shroud 120 located in the middle of the water treatment device. Due to the wide inlet and narrow outlet, the lower guide shroud 120 and the upper guide shroud 110 successively increase the upward flow velocity at the center. At the same time, larger particles are circulated and tumbled at a low level, while fine particles that have not fully formed continue to rise to the outlet of the upper guide shroud 110 and tumble down, thus forming a stratification of coarse and fine particles. When the central water flow rises to the upper outlet of the upper guide shroud 110, it is guided by the enhanced separation baffle 130 and influenced by the gravity of the crystal seeds themselves, and disperses and descends in all directions. The descending crystal seeds pass sequentially through the outer walls of the upper guide shroud 110 and the lower guide shroud 120 and collide with each other, increasing the mixing of fine crystal seeds and prolonging the residence time of the crystal seeds at the middle and high liquid levels.

[0053] The rising water flow passes through the enhanced separation baffle 130 and enters the product water ring pipe 310. The water in the product water ring pipe 310 enters the product water tank 330 or the inlet of the main water buffer zone 202 through the backwash water pipe 3201.

[0054] After running for a period of time, open the valve on the particle discharge ring pipe 510 to collect and discharge particles, so that the particles inside the water inlet zone 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.

[0055] The above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description, and these obvious variations or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A forced circulation softening granulation suspension bed, characterized in that: Includes an outer cylinder (10), with a feeding assembly (20) and a particle discharge component (50) provided at the bottom of the inner cavity of the outer cylinder (10), a sampling tube (40) provided on one side of the outer cylinder (10), and a circulation assembly provided on the side of the outer cylinder (10) away from the sampling tube (40); The outer cylinder (10) is provided with an upper guide shroud (110) and a lower guide shroud (120) in the middle of its inner cavity. The inner cavity of the outer cylinder (10) is provided with a reinforced separation baffle (130) below the product water ring pipe (310). The top of the outer cylinder (10) is provided with an exhaust valve (140). The outer walls of the upper guide shroud (110) and the lower guide shroud (120) are connected to the inner wall of the outer cylinder (10) by a fixing rod (250). The upper guide shroud (110) and the lower guide shroud (120) are both hollow frustum-shaped structures that are narrow at the top and wide at the bottom. The upper opening diameter of the lower guide shroud (120) is the same as the lower opening diameter of the upper guide shroud (110). The feeding assembly (20) includes an inner water inlet 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 located inside the water distribution and dosing tray (240). The inner walls of the inner water inlet cylinder (210) and the outer cylinder (10) enclose a water-side buffer area (201). The inner cavity of the inner water inlet cylinder (210) is configured as a funnel-shaped hollow groove. A side water inlet component (2011) is provided at the inclined part of the hollow groove. The water distribution and dosing tray (240) separates the bottom of the inner cavity of the outer cylinder (10) into a main water buffer area (202). The water distribution and dosing tray (240) is provided with several main water inlets (241). The main water inlets (241) extend from bottom to top through the sodium carbonate storage area (220) and the alkali storage area (230) into the water inlet area (2101) of the water inlet cylinder (210). The bottom of the main water inlets (241) is connected to the main water buffer area (202). The top of the sodium carbonate storage area (220) is provided with several sodium carbonate dosing heads (221). The several sodium carbonate dosing heads (221) extend from bottom to top through the alkali storage area (230) into the water inlet area (2101) of the water inlet cylinder (210). The top of the alkali storage area (230) is provided with several 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 baffle plate (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 an alternating pattern.

2. 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 one above the other, and the side wall of the water distribution and dosing tray (240) is connected to the inner wall of the water inlet inner cylinder (210).

3. 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.

4. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The main water inlet component (241) is made of steel wire with a gap of less than 200 micrometers, and the outlet area of ​​each main water inlet component (241) is no more than 30 mm². 2 .

5. 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 staggered 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).

6. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The main water inlet component (241) is equipped with a sealing ball (2411), which can block the water inlet of the main water inlet component (241) under the action of gravity.

7. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The particle discharge component (50) includes a particle discharge ring pipe (510) and a particle discharge connecting pipe (520). Multiple particle discharge connecting pipes (520) are provided. Multiple particle discharge connecting pipes (520) are arranged symmetrically in the inner wall of the inner ring of the particle discharge ring 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 located near the water distribution and dosing plate (240).

8. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The circulation assembly includes a water production ring pipe (310), a backwash water pipe (3201), a water production tank (330), and a circulation pump (340). The water production ring pipe (310) is located at the top of the inner cavity of the outer cylinder (10). Multiple water inlets are provided 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 main water buffer zone (202). The circulation pipe (322) can be connected to the water production tank (330) through a valve. The liquid in the water production tank (330) can enter the water supply buffer zone (201) through the circulation pump (340).

9. The forced circulation softening granulation suspension bed according to claim 1, characterized in that: The sampling tube (40) has a glass tube sight glass (410) on its vertical pipe. The sampling tube (40) has a first water outlet (401) and a second water outlet (402) at its lower position. The sampling trough (420) is located below the second water outlet (402).

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