Mixed bed tank with uniform mixing function

Abstract

The invention discloses a uniformly mixing mixed bed tank, and belongs to the technical field of mixed bed tanks, the uniformly mixing mixed bed tank comprises a tank body, the bottom end of the tank body is fixedly connected with support legs, the outer wall of the tank body is provided with a manhole, the top end of the tank body is provided with a water inlet assembly, the tank body is internally provided with a water distributor assembly, and the bottom end of the tank body is provided with a water outlet assembly; according to the device, the water distributor assembly is arranged in the device, through the design, an aqueous solution is electrolyzed through the anion-cation resin layer, ion-state impurities in the aqueous solution and anion-cation resin are exchanged and removed, and discharged waste liquid is filtered through the third water distribution pipe; meanwhile, the third water distribution pipe is a wire winding branch pipe, so that the anion-cation resin can be prevented from entering the third water distribution pipe and then being discharged from the middle water outlet, the loss of the anion-cation resin is avoided, the effect of the regenerated anion-cation resin can be ensured, and the influence of subsequent water solution using equipment is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of mixed-bed tanks, and particularly relates to a mixed-bed tank with uniform mixing. Background Art

[0002] The mixed ion exchanger, abbreviated as mixed bed, is a device in which anion and cation resins are filled in a cylindrical tank in a certain proportion and mixed evenly before operation. When water passes through the mixed bed, the H+ and OH- generated immediately form water with a very low degree of dissociation, so the water quality of the effluent is very high. Therefore, the mixed bed is often connected in series behind the reverse osmosis device in the desalination system for the preparation of pure water or high-purity water, etc. The commonly used mixed bed in the water treatment industry conducts the in-vessel operation and the entire regeneration process inside the mixed bed, and the regeneration operation needs to be carried out according to the operating conditions. After the mixed bed is used for a long time, when the ions absorbed by the resin reach saturation, the resin layer in the mixed bed fails. It is necessary to first backwash and stratify the resin in the mixed bed to completely separate the cation resin from the anion resin, and then regenerate, clean, restore the exchange capacity and mix evenly the cation and anion resins respectively, and then continue to exchange with the anions and cations in the influent water.

[0003] In the prior art, the regeneration effect of the anion and cation resins in the mixed bed is poor and the efficiency is low. During the regeneration process, there may be a situation where the anion and cation resins are likely to pass through the pores of the distribution pipes, resulting in resin leakage and waste, which will affect the treatment effect of the mixed bed, leading to the water treated by it not meeting the required requirements and having a certain impact on the subsequent use of water resources, thus causing more losses. Summary of the Invention

[0004] The purpose of the present invention is to provide a mixed-bed tank with uniform mixing to solve the problems in the prior art that the regeneration effect of the anion and cation resins in the mixed bed is poor and the efficiency is low. During the regeneration process, there may be a situation where the anion and cation resins are likely to pass through the pores of the distribution pipes, resulting in resin leakage and waste, which will affect the treatment effect of the mixed bed, leading to the water treated by it not meeting the required requirements and having a certain impact on the subsequent use of water resources, thus causing more losses.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: A mixed-bed tank with uniform mixing, including a tank body, the bottom end of the tank body is fixedly connected with legs, a manhole is arranged on the outer wall of the tank body, a lifting lug is fixedly connected to the top end of the tank body, a ventilation hole is fixedly connected to the top end of the tank body, an alkali inlet pipe is fixedly connected to the top end of the tank body, a sight glass is arranged on the outer wall of the tank body, a mounting plate is fixedly connected to the inner wall of the tank body, a water cap is fixedly connected to the top surface of the mounting plate, an air inlet pipe is arranged at the bottom end of the tank body, a water inlet assembly is arranged at the top end of the tank body, a water distribution device assembly is arranged inside the tank body, and a water outlet assembly is arranged at the bottom end of the tank body.

[0006] As a further description of the above technical solution:

[0007] The water distributor assembly includes a first mounting base, an outer wall of the first mounting base is fixedly connected with a first water distribution pipe, a top end of the first mounting base is fixedly connected with a water inlet connecting pipe, and a bottom end of the first mounting base is fixedly connected with a second mounting base.

[0008] As a further description of the above technical solution:

[0009] An outer wall of the second mounting base is fixedly connected with a second water distribution pipe, a top surface of the second mounting base is fixedly connected with an alkali inlet connecting pipe, an outer wall of the tank is fixedly connected with an intermediate water outlet, one side of the intermediate water outlet is fixedly connected with an intermediate connecting pipe, and an outer wall of the intermediate connecting pipe is fixedly connected with a third water distribution pipe.

[0010] As a further description of the above technical solution:

[0011] The diameter of the first mounting base is larger than the diameter of the second mounting base. There are multiple first water distribution pipes and second water distribution pipes. The first water distribution pipes and the second water distribution pipes are evenly arranged and have a certain included angle between each two. The first water distribution pipes, the second water distribution pipes and the third water distribution pipes are all wire-wound branch pipes.

[0012] As a further description of the above technical solution:

[0013] The water inlet connecting pipe is fixedly connected to it through a through hole opened at the top end of the tank body. The alkali inlet connecting pipe is fixedly connected to it through a through hole opened at the top end of the tank body. One side of the alkali inlet connecting pipe is in contact with the water inlet connecting pipe. One end of the alkali inlet connecting pipe is fixedly connected to an alkali inlet pipe. The alkali inlet connecting pipe penetrates through the first mounting base and is fixedly connected to the first mounting base.

[0014] As a further description of the above technical solution:

[0015] The water inlet assembly includes a first connecting pipe. One end of the first connecting pipe is fixedly connected with a first conveying pipe. A flange is provided at the connection between the first connecting pipe and the first conveying pipe. One end of the first conveying pipe is fixedly connected with a first mounting pipe.

[0016] As a further description of the above technical solution:

[0017] One end of the first mounting pipe is provided with a backwash drain port. The other end of the first mounting pipe is fixedly connected with a water inlet. A first valve is provided at the end of the first mounting pipe where the water inlet is located. One end of the first connecting pipe is fixedly connected with the water inlet connecting pipe.

[0018] As a further description of the above technical solution:

[0019] The water outlet assembly includes a second connecting pipe. One end of the second connecting pipe is fixedly connected to a second conveying pipe. The second connecting pipe and the second conveying pipe are connected by a flange. One end of the second connecting pipe is fixedly connected to the bottom end of the tank.

[0020] As a further description of the above technical solution:

[0021] One end of the second conveying pipe is fixedly connected to a second installation pipe. One end of the second installation pipe is provided with a water outlet. The other end of the second installation pipe is provided with an anti-washing water inlet. A second valve is provided at one end of the second installation pipe close to the anti-washing water inlet. An acid inlet is fixedly connected to one side of the second conveying pipe.

[0022] As a further description of the above technical solution:

[0023] A normal washing drain port is fixedly connected to the other side of the second conveying pipe. The acid inlet is located below the water outlet. The normal washing drain port is located below the anti-washing water inlet. The acid inlet and the normal washing drain port are arranged opposite to each other. Water valves are provided at the anti-washing drain port, the acid inlet, the water outlet, and the normal washing drain port.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] 1. In the present invention, by providing a water distribution component inside, when treating an aqueous solution, the anion and cation resins are added into the tank body, and the aqueous solution is sent into the water inlet connecting pipe through the water inlet component, so that the aqueous solution can enter the first mounting seat and be discharged through the first water distribution pipe, and the aqueous solution discharged from the first water distribution pipe uniformly flows onto the resin layer, thereby removing the ionic impurities in the aqueous solution through the anion and cation resin layers. At the same time, after the aqueous solution passes through the anion and cation resin layers, it can flow through the water cap and into the water outlet component for discharge. When the resistivity of the outlet water does not meet the water production requirements, it indicates that the resin is already in a saturated state and has insufficient exchange capacity. At this time, the anion and cation resins can be stratified by backwashing. After complete stratification, the lye can be sent into the lye connecting pipe through the lye inlet pipe and enter the second mounting seat, and then be discharged through the second water distribution pipe on the outer wall of the second mounting seat to contact the stratified anion and cation resins. At the same time, the acid solution is sent into the tank body from the bottom of the tank body through the pipeline of the water outlet component and contacts the cation resin in the tank body. Then, the middle water outlet is opened so that the waste liquid can enter the third water distribution pipe, and the waste liquid is discharged through the middle water outlet until the middle drainage is neutral, and the entry of the acid solution and the lye is stopped, thereby completing the regeneration of the resin. Through this design, when treating the aqueous solution, the aqueous solution can be evenly scattered on the anion and cation resin layers through the first water distribution pipe, so that the aqueous solution is electrolyzed through the anion and cation resin layers, and the ionic impurities in the aqueous solution are exchanged and removed with the anion and cation resins, and the ionic impurities in the aqueous solution are adsorbed by the anion and cation resins to achieve the treatment of the aqueous solution. At the same time, when the anion and cation resins are in a saturated state and have insufficient exchange capacity, the anion and cation resins are stratified by backwashing, and then the anion and cation resins are regenerated by injecting lye and acid solution. At the same time, the lye is dispersed through the second water distribution pipe, and the discharged waste liquid is filtered through the third water distribution pipe. At the same time, the third water distribution pipe is a wire-wound branch pipe, which can prevent the anion and cation resins from entering the third water distribution pipe and then being discharged from the middle water outlet, thereby avoiding the loss of the anion and cation resins, ensuring the effect of the regenerated anion and cation resins, and avoiding the impact on the subsequent equipment using the aqueous solution.

[0026] 2. In the present invention, by providing a water outlet assembly inside, when treating an aqueous solution, the aqueous solution can pass through the water cap and enter the second connecting pipe, and then enter the second installation pipe through the second conveying pipe, so that the aqueous solution can be discharged from the water outlet to complete the treatment. When the resin is already in a saturated state and there is not enough exchange capacity for backwashing, the water inlet and the water outlet are closed, and the backwash water inlet is opened to input water from the backwash water inlet, so that the water can enter the bottom of the tank through the second conveying pipe and the second connecting pipe, and then the water passes through the anion and cation resins from below. Since the densities of the anion and cation resins are different, they will be stratified to form two resin layers. The stratification effect can be observed through the sight glass. After the backwash stratification reaches the set time, the backwash water inlet is closed. After the anion and cation resins are completely stratified, the backwash drain port is opened to drain the water in the tank to complete the stratification of the anion and cation resins. After the anion and cation resins are regenerated, the middle water outlet is closed, the air inlet pipe at the bottom of the tank is opened, and compressed air is introduced through the air inlet pipe at the bottom of the tank to stir and mix the resins. After mixing for the set time, the air inlet pipe is closed, and the water outlet is quickly opened to drain the water to force the resins to fall rapidly, avoiding re-stratification of the resins during the fall. Then the middle water outlet and the water outlet are closed, the water inlet is opened until the tank is filled with water, and then the vent hole is closed, and the water outlet is opened. The designed flow rate is the normal washing flow rate for normal washing until the normal washing effluent meets the effluent requirements before it can be put into use again. Through this design, when treating water, it can discharge the treated water and transport it to other pipes, and at the same time, during the regeneration process of the anion and cation resins, different operations required during the regeneration process can be processed through the acid inlet, water outlet, normal washing drain port, backwash water inlet, etc. connected to the second conveying pipe, so that the anion and cation resins can be regenerated quickly and the regeneration efficiency of the anion and cation resins can be improved.

[0027] 3. In the present invention, by providing a water inlet assembly inside, when in use, the anion and cation resins can be added to the tank, and then the aqueous solution is transported to the first installation pipe through the water inlet, and then the aqueous solution is sent into the water inlet connecting pipe through the first conveying pipe and the first connecting pipe. At the same time, the aqueous solution is sent into the first installation seat through the water inlet connecting pipe and discharged through the first water distribution pipe on the outer wall of the first installation seat, so that the aqueous solution enters the anion and cation resins for treatment. Through this design, it is realized that the aqueous solution is sent into the first installation seat through the water inlet, so as to bring the aqueous solution into contact with the anion and cation resins, and then treat the aqueous solution. At the same time, the first valve on one side of the water inlet can facilitate the opening and closing of the water inlet, so that it is convenient for the staff to use when operating the mixed bed tank, thereby improving the production efficiency and the treatment efficiency of the aqueous solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic perspective view of a mixed bed tank for uniform mixing.

[0029] Figure 2 Explosion three-dimensional structure diagram of a uniformly mixed mixed-bed tank.

[0030] Figure 3 Internal structure diagram of a uniformly mixed mixed-bed tank.

[0031] Figure 4 Explosion structure diagram of the water outlet assembly in a uniformly mixed mixed-bed tank.

[0032] Figure 5 Explosion structure diagram of the water inlet assembly in a uniformly mixed mixed-bed tank.

[0033] Figure 6 Explosion structure diagram of the water distributor assembly in a uniformly mixed mixed-bed tank.

[0034] Figure 7 Partial structure diagram of the water distributor assembly in a uniformly mixed mixed-bed tank.

[0035] Figure 8 Enlarged structure diagram of location A in a uniformly mixed mixed-bed tank.

[0036] Legend description:

[0037] 1. Leg; 2. Tank body; 3. Manhole; 4. Lifting lug; 5. Vent hole; 6. Caustic inlet pipe; 7. Water inlet assembly; 71. First connecting pipe; 72. First conveying pipe; 73. Backwashing drain port; 74. First installation pipe; 75. First valve; 76. Water inlet; 8. Sight glass; 9. Water outlet assembly; 91. Second connecting pipe; 92. Second conveying pipe; 93. Acid inlet; 94. Water outlet; 95. Second installation pipe; 96. Normal washing drain port; 97. Second valve; 98. Backwashing water inlet; 10. Water cap; 11. Installation plate; 12. Air inlet pipe; 13. Water distributor assembly; 131. Caustic inlet connecting pipe; 132. Water inlet connecting pipe; 133. First installation seat; 134. Second installation seat; 135. First water distribution pipe; 136. Second water distribution pipe; 137. Third water distribution pipe; 138. Intermediate connecting pipe; 139. Intermediate water outlet. Detailed implementation manners

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0039] Please refer to Figures 1 - 8, the present invention provides a technical solution: a uniformly mixed mixed bed tank, including a tank body 2, the bottom end of the tank body 2 is fixedly connected with legs 1, a manhole 3 is arranged on the outer wall of the tank body 2, the top end of the tank body 2 is fixedly connected with a lifting lug 4, the top end of the tank body 2 is fixedly connected with a ventilation hole 5, the top end of the tank body 2 is fixedly connected with an alkali inlet pipe 6, a sight glass 8 is opened on the outer wall of the tank body 2, a mounting plate 11 is fixedly connected to the inner wall of the tank body 2, a water cap 10 is fixedly connected to the top surface of the mounting plate 11, an air inlet pipe 12 is arranged at the bottom end of the tank body 2, a water inlet assembly 7 is arranged at the top end of the tank body 2, a water distribution assembly 13 is arranged inside the tank body 2, and a water outlet assembly 9 is arranged at the bottom end of the tank body 2;

[0040] The water distribution assembly 13 includes a first mounting seat 133, a first water distribution pipe 135 is fixedly connected to the outer wall of the first mounting seat 133, a water inlet connecting pipe 132 is fixedly connected to the top end of the first mounting seat 133, a second mounting seat 134 is fixedly connected to the bottom end of the first mounting seat 133, a second water distribution pipe 136 is fixedly connected to the outer wall of the second mounting seat 134, an alkali inlet connecting pipe 131 is fixedly connected to the top surface of the second mounting seat 134, an intermediate water outlet 139 is fixedly connected to the outer wall of the tank body 2, an intermediate connecting pipe 138 is fixedly connected to one side of the intermediate water outlet 139, a third water distribution pipe 137 is fixedly connected to the outer wall of the intermediate connecting pipe 138, the diameter of the first mounting seat 133 is larger than that of the second mounting seat 134, a plurality of the first water distribution pipes 135 and the second water distribution pipes 136 are provided, the first water distribution pipes 135 and the second water distribution pipes 136 are uniformly arranged and have a certain included angle between each other, the first water distribution pipes 135, the second water distribution pipes 136 and the third water distribution pipes 137 are all wire-wound branch pipes, the water inlet connecting pipe 132 is fixedly connected to it through a through hole opened at the top end of the tank body 2, the alkali inlet connecting pipe 131 is fixedly connected to it through a through hole opened at the top end of the tank body 2, one side of the alkali inlet connecting pipe 131 is in contact with the water inlet connecting pipe 132, one end of the alkali inlet connecting pipe 131 is fixedly connected to the alkali inlet pipe 6, and the alkali inlet connecting pipe 131 penetrates through the first mounting seat 133 and is fixedly connected to the first mounting seat 133.

[0041] The specific embodiments are as follows: When treating an aqueous solution, cation and anion resins are added into the tank body 2, and the aqueous solution is sent into the water inlet connecting pipe 132 through the water inlet assembly 7, so that the aqueous solution can enter the first mounting seat 133 and be discharged through the first water distribution pipe 135 at the same time, and the aqueous solution discharged from the first water distribution pipe 135 uniformly flows onto the resin layer, so as to remove the ionic impurities in the aqueous solution through the cation and anion resin layers. At the same time, after the aqueous solution passes through the cation and anion resin layers, it can flow through the water cap 10 into the water outlet assembly 9 for discharge. When the resistivity of the outlet water does not meet the water production requirements, it means that the resin is in a saturated state and does not have enough exchange capacity. The cation and anion resins can be stratified by backwashing. After complete stratification, the alkali solution can be sent into the alkali inlet connecting pipe 131 through the alkali inlet pipe 6 and enter the second mounting seat 134, so as to be discharged through the second water distribution pipe 136 on the outer wall of the second mounting seat 134 to contact the stratified cation and anion resins. At the same time, the acid solution is sent into the tank body 2 from the bottom end of the tank body 2 through the pipeline of the water outlet assembly 9 and contacts the cation resin in the tank body 2. Then, the middle water outlet 139 is opened so that the waste liquid can enter the third water distribution pipe 137, and the waste liquid is discharged through the middle water outlet 139 until the middle drainage is neutral, and the entry of the acid solution and the alkali solution is stopped, thus completing the regeneration of the resin.

[0042] The water outlet assembly 9 includes a second connecting pipe 91. One end of the second connecting pipe 91 is fixedly connected with a second conveying pipe 92. The second connecting pipe 91 and the second conveying pipe 92 are connected by a flange. One end of the second connecting pipe 91 is fixedly connected with the bottom end of the tank body 2. One end of the second conveying pipe 92 is fixedly connected with a second mounting pipe 95. One end of the second mounting pipe 95 is provided with a water outlet 94, and the other end of the second mounting pipe 95 is provided with a backwashing water inlet 98. One end of the second mounting pipe 95 close to the backwashing water inlet 98 is provided with a second valve 97. One side of the second conveying pipe 92 is fixedly connected with an acid inlet 93, and the other side of the second conveying pipe 92 is fixedly connected with a normal washing drain port 96. The acid inlet 93 is located below the water outlet 94, and the normal washing drain port 96 is located below the backwashing water inlet 98. The acid inlet 93 and the normal washing drain port 96 are arranged opposite to each other. Water valves are arranged at the backwashing drain port 73, the acid inlet 93, the water outlet 94, and the normal washing drain port 96.

[0043] The specific embodiments are as follows: When treating an aqueous solution, the aqueous solution can pass through the water cap 10 and enter the second connecting pipe 91, and then enter the second installation pipe 95 through the second delivery pipe 92, so that the aqueous solution can be discharged from the water outlet 94 to complete the treatment. When the resin is already in a saturated state and there is not enough exchange capacity for backwashing, the water inlet 76 and the water outlet 94 are closed, and the backwash water inlet 98 is opened to input water from the backwash water inlet 98, so that the water can enter the bottom of the tank body 2 through the second delivery pipe 92 and the second connecting pipe 91, and then the water passes through the anion and cation resins from below. Due to the different densities of the anion and cation resins, stratification occurs, forming two resin layers. The stratification effect can be observed from the sight glass 8. After the backwash stratification reaches the set time, the backwash water inlet 98 is closed. After the anion and cation resins are completely stratified, the backwash drain port 73 is opened to drain the water in the tank body 2 to complete the stratification of the anion and cation resins. After the anion and cation resins are regenerated, the middle water outlet 139 is closed, and the air inlet pipe 12 at the bottom of the tank body 2 is opened. Compressed air is introduced through the air inlet pipe 12 at the bottom of the tank body 2 to stir and mix the resins. After mixing for the set time, the air inlet pipe 12 is closed, and the water outlet 94 is quickly opened to drain the water to force the resins to fall rapidly, avoiding re-stratification of the resins during the fall. Then the middle water outlet 139 and the water outlet 94 are closed, and the water inlet 76 is opened until the tank body 2 is filled with water. Then the vent hole 5 is closed, and the water outlet 94 is opened. The designed flow rate is the normal washing flow rate for normal washing until the normal washing effluent meets the effluent requirements before it can be put into use again.

[0044] The water inlet assembly 7 includes a first connecting pipe 71. One end of the first connecting pipe 71 is fixedly connected with a first delivery pipe 72. A flange is provided at the connection between the first connecting pipe 71 and the first delivery pipe 72. One end of the first delivery pipe 72 is fixedly connected with a first installation pipe 74. A backwash drain port 73 is provided at one end of the first installation pipe 74. The other end of the first installation pipe 74 is fixedly connected with a water inlet 76. A first valve 75 is provided at the end of the first installation pipe 74 where the water inlet 76 is located. One end of the first connecting pipe 71 is fixedly connected with the water inlet connecting pipe 132.

[0045] The specific embodiments are as follows: When in use, the anion and cation resins can be added into the tank body 2, and then the aqueous solution is conveyed into the first installation pipe 74 through the water inlet 76, and then the aqueous solution is sent into the water inlet connecting pipe 132 through the first delivery pipe 72 and the first connecting pipe 71. At the same time, the aqueous solution is sent into the first mounting seat 133 through the water inlet connecting pipe 132 and discharged through the first water distribution pipe 135 on the outer wall of the first mounting seat 133, so that the aqueous solution enters the anion and cation resins for treatment.

[0046] Working principle: When treating an aqueous solution, cation and anion resins are added into the tank body 2, and then the aqueous solution is conveyed into the first installation pipe 74 through the water inlet 76. Thus, the aqueous solution is sent into the water inlet connecting pipe 132 through the first conveying pipe 72 and the first connecting pipe 71. At the same time, the aqueous solution is sent into the first installation seat 133 through the water inlet connecting pipe 132, and the aqueous solution discharged from the first water distribution pipe 135 on the outer wall of the first installation seat 133 evenly flows onto the resin layer. Thus, the ionic impurities in the aqueous solution are removed by the cation and anion resin layers. At the same time, after the aqueous solution passes through the cation and anion resin layers, it can pass through the water cap 10 and flow into the second connecting pipe 91, and enter the second installation pipe 95 through the second conveying pipe 92. Thus, the aqueous solution can be discharged from the water outlet 94 to complete the treatment. When the resistivity of the effluent does not meet the water production requirements, it indicates that the resin is already in a saturated state and there is not enough exchange capacity for backwashing. Close the water inlet 76 and the water outlet 94, and open the backwash water inlet 98 to input water from the backwash water inlet 98, so that the water can enter the bottom of the tank body 2 through the second conveying pipe 92 and the second connecting pipe 91. Thus, the water passes through the cation and anion resins from below. Due to the different densities of the cation and anion resins, they will be stratified to form two resin layers. The stratification effect can be observed from the sight glass 8. After the backwash stratification reaches the set time, close the backwash water inlet 98. After the cation and anion resins are completely stratified, open the backwash drain port 73 to drain the water in the tank body 2 to complete the stratification of the cation and anion resins. After complete stratification, caustic solution can be sent into the caustic inlet connecting pipe 131 through the caustic inlet pipe 6 and enter the second installation seat 134. Thus, it is discharged from the second water distribution pipe 136 on the outer wall of the second installation seat 134 to contact the stratified cation and anion resins. At the same time, the acid solution is sent into the tank body 2 from the bottom end of the tank body 2 through the pipeline of the water outlet assembly 9 and contacts the cation resin in the tank body 2. Then open the middle water outlet 139 so that the waste liquid can enter the third water distribution pipe 137. Thus, the waste liquid is discharged through the middle water outlet 139 until the middle drainage is neutral and the entry of the acid solution and the caustic solution is stopped to complete the regeneration of the resin. After the cation and anion resins are regenerated, close the middle water outlet 139, open the air inlet pipe 12 at the bottom of the tank body 2, and introduce compressed air from the air inlet pipe 12 at the bottom of the tank body 2 to stir and mix the resins. After mixing for the set time, close the air inlet pipe 12, quickly open the water outlet 94 to drain water to force the resins to fall rapidly, avoiding re-stratification of the resins during falling. Then close the middle water outlet 139 and the water outlet 94, open the water inlet 76 until the tank body 2 is filled with water, then close the vent hole 5, open the water outlet 94, and perform positive flushing at the designed positive flushing flow rate until the positive flushing effluent meets the effluent requirements before it can be put into use again.

[0047] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A uniformly mixed mixed-bed tank, comprising a tank body (2), characterized in that: The bottom end of the tank body (2) is fixedly connected with support legs (1). A manhole (3) is provided on the outer wall of the tank body (2). The top end of the tank body (2) is fixedly connected with a lifting lug (4). The top end of the tank body (2) is fixedly connected with a ventilation hole (5). The top end of the tank body (2) is fixedly connected with an alkali inlet pipe (6). A sight glass (8) is provided on the outer wall of the tank body (2). A mounting plate (11) is fixedly connected to the inner wall of the tank body (2). A water cap (10) is fixedly connected to the top surface of the mounting plate (11). An air inlet pipe (12) is provided at the bottom end of the tank body (2). A water inlet assembly (7) is provided at the top end of the tank body (2). A water distribution assembly (13) is provided inside the tank body (2). A water outlet assembly (9) is provided at the bottom end of the tank body (2).

2. The uniformly mixed mixed bed tank according to claim 1, characterized in that The water distribution assembly (13) includes a first mounting seat (133). A first water distribution pipe (135) is fixedly connected to the outer wall of the first mounting seat (133). A water inlet connecting pipe (132) is fixedly connected to the top end of the first mounting seat (133). A second mounting seat (134) is fixedly connected to the bottom end of the first mounting seat (133).

3. The uniformly mixed mixed bed tank according to claim 2, characterized in that, A second water distribution pipe (136) is fixedly connected to the outer wall of the second mounting seat (134). An alkali inlet connecting pipe (131) is fixedly connected to the top surface of the second mounting seat (134). An intermediate water outlet (139) is fixedly connected to the outer wall of the tank body (2). An intermediate connecting pipe (138) is fixedly connected to one side of the intermediate water outlet (139). A third water distribution pipe (137) is fixedly connected to the outer wall of the intermediate connecting pipe (138).

4. The uniformly mixed mixed bed tank according to claim 3, characterized in that, The diameter of the first mounting seat (133) is larger than that of the second mounting seat (134). A plurality of first water distribution pipes (135) and second water distribution pipes (136) are provided. The first water distribution pipes (135) and the second water distribution pipes (136) are evenly arranged and have a certain included angle between each other. The first water distribution pipes (135), the second water distribution pipes (136) and the third water distribution pipes (137) are all wire-wound branch pipes.

5. The uniformly mixed mixed bed tank according to claim 4, wherein The water inlet connecting pipe (132) is fixedly connected to it through a through hole provided at the top end of the tank body (2). The alkali inlet connecting pipe (131) is fixedly connected to it through a through hole provided at the top end of the tank body (2). One side of the alkali inlet connecting pipe (131) is in contact with the water inlet connecting pipe (132). One end of the alkali inlet connecting pipe (131) is fixedly connected to the alkali inlet pipe (6). The alkali inlet connecting pipe (131) passes through the first mounting seat (133) and is fixedly connected to the first mounting seat (133).

6. The uniformly mixed mixed bed tank according to claim 5, wherein The water inlet assembly (7) includes a first connecting pipe (71). A first conveying pipe (72) is fixedly connected to one end of the first connecting pipe (71). A flange is provided at the connection between the first connecting pipe (71) and the first conveying pipe (72). A first mounting pipe (74) is fixedly connected to one end of the first conveying pipe (72).

7. The uniformly mixed mixed bed tank according to claim 6, characterized in that, One end of the first installation pipe (74) is provided with a backwash drain port (73). The other end of the first installation pipe (74) is fixedly connected with a water inlet (76). A first valve (75) is provided at one end of the first installation pipe (74) where the water inlet (76) is located. One end of the first connecting pipe (71) is fixedly connected with the water inlet connecting pipe (132).

8. The evenly mixed mixed bed tank according to claim 7, wherein The water outlet assembly (9) includes a second connecting pipe (91). One end of the second connecting pipe (91) is fixedly connected with a second delivery pipe (92). The second connecting pipe (91) and the second delivery pipe (92) are connected by a flange. One end of the second connecting pipe (91) is fixedly connected with the bottom end of the tank body (2).

9. The evenly mixed mixed bed tank according to claim 8, characterized in that, One end of the second delivery pipe (92) is fixedly connected with a second installation pipe (95). One end of the second installation pipe (95) is provided with a water outlet (94). The other end of the second installation pipe (95) is provided with a backwash water inlet (98). A second valve (97) is provided at one end of the second installation pipe (95) close to the backwash water inlet (98). An acid inlet (93) is fixedly connected to one side of the second delivery pipe (92).

10. The evenly mixed mixed bed tank according to claim 9, characterized in that, A positive wash drain port (96) is fixedly connected to the other side of the second delivery pipe (92). The acid inlet (93) is located below the water outlet (94). The positive wash drain port (96) is located below the backwash water inlet (98). The acid inlet (93) and the positive wash drain port (96) are arranged oppositely. Water valves are provided at the backwash drain port (73), the acid inlet (93), the water outlet (94), and the positive wash drain port (96).

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