Waste acid recovery resin adsorption bed and waste acid recovery system

Abstract

The utility model relates to the technical field of waste liquid treatment, and provides a waste acid recovery resin adsorption bed and a waste acid recovery system.The waste acid recovery resin adsorption bed comprises a resin tank, the resin tank is filled with adsorption resin capable of adsorbing acid ions, and the particle size of the adsorption resin is 0.1-0.3 mm; the bottom of the resin tank is connected with a first water distribution device, the first water distribution device is provided with a first liquid inlet pipe, and the first liquid inlet pipe is used for supplying acid liquid into the resin tank upwards in the axial direction; the top of the resin tank is connected with a second water distribution device, the second water distribution device is provided with a second liquid inlet pipe, and the second liquid inlet pipe is used for supplying flushing water into the resin tank downwards in the axial direction; according to the utility model, acid liquor and flushing water are uniformly distributed through the two water distribution devices, so that adsorption resin in the resin tank can be fully contacted and efficiently adsorb acid ions, free acid ions in resin particles can be effectively flushed out to form recycled acid liquor, the acid liquor can be recycled, the waste acid treatment effect is obvious, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to waste liquid treatment technical field especially, relates to a kind of waste acid recovery resin adsorption bed and waste acid recovery system. BACKGROUND

[0002] In the production process of cold-rolled steel surface treatment, a large amount of pickling waste liquid will be produced, which generally contains H + And Fe 2+ Due to its severe corrosive nature, direct discharge of such waste liquid not only seriously pollutes the environment, but also causes great waste.

[0003] Currently, the commonly used methods for treating hydrochloric acid wastewater and waste hydrochloric acid include calcination, extraction and evaporation. Among them, the calcination method is mainly used for the treatment of hydrochloric acid pickling waste liquid, which can recover hydrochloric acid and iron resources in waste acid, and its principle is that the residual hydrochloric acid in the pickling waste liquid is evaporated into steam at high temperature, while the ferrous salt is quantitatively hydrolyzed into iron oxide and hydrogen chloride in an atmosphere with sufficient water vapor and appropriate oxygen. However, the high-temperature calcination method for treating waste acid has the problems of complex treatment process, the need for more equipment, high corrosion resistance requirement for equipment, high cost, which is more suitable for large steel enterprises, but limits its application in some small and medium-sized enterprises.

[0004] Extraction method is to extract metal ions from pickling waste liquid by using the different distribution coefficients of various components in mutually insoluble solvents, so as to separate acid and metal ions. However, efficient extractants are generally toxic organic solvents, and a large amount of extractants are needed in the treatment process, which is high in cost and inconvenient to operate, and is not suitable.

[0005] Evaporation method mainly consumes steam to heat and evaporate hydrochloric acid-containing wastewater (waste hydrochloric acid) to obtain hydrochloric acid and concentrated liquid phase. Although it has low investment and convenient operation, the recovered product is generally dilute hydrochloric acid with low concentration, which cannot be directly used due to the low concentration of recovered hydrochloric acid, and the equipment is severely corroded.

[0006] Therefore, both incineration and evaporation require a large amount of energy consumption, and the equipment investment is large, the process is complex, and the treatment effect is not ideal. INVENTION CONTENTS

[0007] The utility model provides a kind of waste acid recovery resin adsorption bed and waste acid recovery system to solve the problems of complex equipment, high cost and poor recovery effect in prior art for treating pickling waste liquid.

[0008] The utility model provides a kind of waste acid recovery resin adsorption bed, comprising: resin tank, the resin tank is filled with the adsorption resin capable of adsorbing acid ion, the particle size of the adsorption resin is 0.1-0.3mm;

[0009] The bottom of the resin tank is connected with a first water distribution device, and the first water distribution device is provided with a first liquid inlet pipe for supplying acid liquid into the resin tank along the axial direction upwardly;

[0010] The top of the resin tank is connected with a second water distribution device, and the second water distribution device is provided with a second liquid inlet pipe for supplying flushing water into the resin tank along the axial direction downwardly.

[0011] According to the waste acid recovery resin adsorption bed, the first water distribution device comprises a water inlet body and a resin carrier body connected with each other, the inside of the water inlet body is filled with buffer filler for reducing and balancing the liquid flow rate, the resin carrier body is connected with the bottom of the resin tank, and filter cloth is arranged in the resin carrier body for supporting the adsorption resin.

[0012] According to the waste acid recovery resin adsorption bed, a water distribution assembly is arranged between the water inlet body and the resin carrier body, the water distribution assembly comprises a first pipe body and first and second water distribution plates arranged at the two ends of the first pipe body, the first water distribution plate is sealingly connected with the resin carrier body, and a plurality of first water passing holes are uniformly distributed on the surface of the first water distribution plate; the second water distribution plate is sealingly connected with the water inlet body, a plurality of second water passing holes are uniformly distributed on the surface of the second water distribution plate, and the first water passing holes and the second water passing holes are arranged in a staggered manner.

[0013] According to the waste acid recovery resin adsorption bed, the water inlet body comprises a second pipe body and liquid inlet end plates and liquid inlet flange plates arranged at the two ends of the second pipe body, the buffer filler is arranged in the second pipe body, the liquid inlet end plates are used for supporting the buffer filler, and the middle part of the liquid inlet end plates is connected with the first liquid inlet pipe, and the liquid inlet flange plates are sealingly connected with the second water distribution plates.

[0014] According to the waste acid recovery resin adsorption bed, the resin carrier body further comprises first and second connecting flanges, the outer end face of the first connecting flange is sealingly connected with the bottom of the resin tank, and the outer end face of the second connecting flange is sealingly connected with the outer end face of the first water distribution plate; the filter cloth is circular, a mounting ring is arranged around the outer edge of the filter cloth, the inner end face of the second connecting flange is concentrically provided with first and second annular grooves, the diameter of the first annular groove is smaller than that of the second annular groove, the mounting ring is matched with the first annular groove, the second annular groove is used for mounting a sealing ring, and the first connecting flange can press the mounting ring in the first annular groove and press the sealing ring in the second annular groove when the first connecting flange is connected with the second connecting flange.

[0015] The utility model provides waste acid recovery resin adsorption bed, second water distribution device with first water distribution device's structure is same, symmetry is connected in both ends of resin tank, resin bearing of second water distribution device is connected with the top of resin tank.

[0016] The utility model provides waste acid recovery resin adsorption bed, resin tank first pipe body and second pipe body all are cylindrical, resin tank first pipe body with second pipe body concentric arrangement and same diameter, both ends of resin tank are provided with third connecting flange, third connecting flane is sealedly connected with first connecting flange.

[0017] The utility model provides waste acid recovery resin adsorption bed, first connecting flange or third connecting flange's outer end surface is provided with third annular groove for installing sealing ring,

[0018] The outer end surface of first water distribution board and the outer end surface of second water distribution board are equipped with fourth annular groove for installing sealing ring.

[0019] The utility model provides waste acid recovery resin adsorption bed, the outside of liquid inlet end plate is provided with first reinforcing rib board and second reinforcing rib board, first reinforcing rib board is cross -like distribution in the surface of liquid inlet end plate, second reinforcing rib board is connected with first liquid inlet pipe, is used for reinforcing the connection of first liquid inlet pipe and liquid inlet end plate.

[0020] The utility model provides waste acid recovery resin adsorption bed, the height of adsorbing resin is 15-50cm.

[0021] The utility model discloses still provides a kind of waste acid recovery system, including multiple waste acid recovery resin adsorption beds connected together, the waste acid recovery resin adsorption bed is the waste acid recovery resin adsorption bed described above.

[0022] The utility model provides a kind of waste acid recovery resin adsorption bed, comprising: resin tank, first water distribution device and second water distribution device, the utility model whole simple structure, it is easy to operate, utilize the "acid delay" characteristics of adsorption resin, can recover hydrochloric acid or sulfuric acid ion in the waste acid solution containing heavy metal, and remove heavy metal ion therein, the main role of two water distribution devices is to uniformly distribute acid liquor and flushing water, to ensure that the adsorption resin in resin tank can be fully contacted and high-efficiency adsorption acid ion, when waste acid liquor enters resin tank from below to top by first liquid inlet pipe, free acid ion in acid liquor is adsorbed in resin particle interior by adsorption resin, simultaneously, salt and other impurities flow out resin tank as unable to enter resin particle interior, realize the separation of free acid and metal salt or other impurities;And acid can be ensured by countercurrent to have longer contact time of waste acid and adsorption resin, enhance adsorption effect;When carrying out resin cleaning, flushing water is supplied into resin tank along the axial direction downward by second liquid inlet pipe, and flushing water can effectively flush free acid ion in resin particle, form recovery acid liquor, can be recycled, waste acid treatment effect is remarkable and cost is reduced;Simultaneously, flushing water can also take away impurities and residue on resin, so that resin restores adsorption capacity, under countercurrent operating mode, the direction of flushing water flow is opposite to the flow direction of acid liquor in adsorption process, so that it can more thoroughly remove pollutants on resin, ensure the regeneration effect of resin. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the utility model or prior art, the following will be to the embodiment or prior art description needed to use a simple introduction to the drawings, obviously, the following description in the drawings is some embodiments of the utility model, for those skilled in the art, without creative labor, according to these drawings, other drawings can also be obtained.

[0024] Figure 1 It is the explosion view of the waste acid recovery resin adsorption bed provided by the utility model embodiment.

[0025] Figure 2 It is the overall structure schematic view of the waste acid recovery resin adsorption bed provided by the utility model embodiment.

[0026] Figure 3 It is the structure schematic view of the liquid inlet end plate provided by the utility model embodiment.

[0027] Figure 4 It is the structure schematic view of the first water distribution plate provided by the utility model embodiment.

[0028] Figure 5 It is the projection schematic view of the first water hole on the second water distribution plate provided by the utility model embodiment.

[0029] Figure 6Is the structural schematic view of the second connecting flange provided by the embodiment of the utility model.

[0030] Figure 7 Is the structural schematic view of the first connecting flange provided by the embodiment of the utility model.

[0031] Figure 8 Is the structural schematic view of the filter cloth provided by the embodiment of the utility model.

[0032] Figure 9 Is the sectional schematic view of the filter cloth provided by the embodiment of the utility model.

[0033] Reference signs:

[0034] 1, resin tank;11, third connecting flange;

[0035] 2, first water distribution device;21, first liquid inlet pipe;

[0036] 3, second water distribution device;31, second liquid inlet pipe;

[0037] 4, water inlet body;41, second pipe body;42, liquid inlet end plate;43, liquid inlet flange plate;

[0038] 5, resin carrier;51, filter cloth;511, mounting ring;52, first connecting flange;521, third annular groove;53, second connecting flange;531, first annular groove;532, second annular groove;

[0039] 6, water distribution assembly;61, first pipe body;62, first water distribution plate;621, first water passing hole;63, second water distribution plate;631, second water passing hole;

[0040] 7, first reinforcing rib plate;8, second reinforcing rib plate;9, first screw;10, second screw. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme in the utility model will be described clearly and completely below in combination with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0042] The utility model discloses a kind of waste acid recovery resin adsorption bed. Figures 1-9 The utility model discloses a kind of waste acid recovery resin adsorption bed.

[0043] The embodiment of the utility model provides a kind of waste acid recovery resin adsorption bed, applied to waste acid treatment process, such as Figures 1-2As shown, it comprises: a resin tank 1, a first water distribution device 2 and a second water distribution device 3.

[0044] The first water distribution device 2 and the second water distribution device 3 are symmetrically connected at two ends of the resin tank 1, and the resin tank 1 is filled with adsorption resin capable of adsorbing acid ions, and the particle size of the adsorption resin is 0.1-0.3mm, which is about 20% smaller than that of the resin in the traditional ion exchange system, and the smaller particles enable more resin particles to be contained in a unit volume, thereby providing a larger total surface area and improving the adsorption effect and adsorption efficiency; the bottom of the resin tank 1 is connected with the first water distribution device 2, the first water distribution device 2 is provided with a first liquid inlet pipe 21, and the first liquid inlet pipe 21 is used for supplying acid liquid into the resin tank 1 along the axial direction upward; the top of the resin tank 1 is connected with the second water distribution device 3, and the second water distribution device 3 is provided with a second liquid inlet pipe 31, and the second liquid inlet pipe 31 is used for supplying washing water into the resin tank 1 along the axial direction downward.

[0045] In this way, the utility model has the advantages of simple overall structure and convenient operation, can recover hydrochloric acid or sulfuric acid ions in the waste acid solution containing heavy metals by using the "acid delay" characteristics of the adsorption resin, and remove the heavy metal ions therein, and the main function of the two water distribution devices is to uniformly distribute the acid liquid and the washing water, so as to ensure that the adsorption resin in the resin tank 1 can fully contact and efficiently adsorb the acid ions, when the waste acid liquid enters the resin tank 1 from the bottom to the top through the first liquid inlet pipe 21, the free acid ions in the acid liquid are adsorbed inside the resin particles by the adsorption resin, at the same time, the salts and other impurities flow out of the resin tank 1 because they cannot enter the resin particles, thereby realizing the separation of the free acid and the metal salt or other impurities; and the countercurrent acid feeding can ensure that the waste acid has a longer contact time with the adsorption resin, thereby enhancing the adsorption effect; when the resin is cleaned, the washing water is supplied into the resin tank 1 along the axial direction downward through the second liquid inlet pipe 31, and the washing water can effectively flush out the free acid ions in the resin particles, thereby forming the recovered acid liquid which can be recycled, and the waste acid treatment effect is remarkable and the cost is reduced; at the same time, the washing water can also take away the impurities and residues on the resin, so that the adsorption capacity of the resin is restored, and under the countercurrent operation mode, the direction of the washing water flow is opposite to that of the acid liquid in the adsorption process, so that the pollutants on the resin can be more completely removed, thereby ensuring the regeneration effect of the resin.

[0046] Preferably, in the embodiment, the height of the adsorption resin filled in the resin tank 1 is 15-50cm, and because the particle size of the resin particles is smaller than that of the resin in the traditional ion exchange system, the pressure loss of the fluid passing through the resin tank 1 under the same volume is increased, in order to reduce the pressure loss, the height of the resin bed of the utility model is designed to be lower than that of the traditional resin bed, so that the resistance encountered by the fluid when passing through the resin bed is relatively small, and under the same flow rate, the operating pressure is lower, thereby improving the exchange kinetics.

[0047] The adsorption resin used in the embodiment is a strong base type quaternary ammonium salt type I anion exchange resin,

[0048] The adsorption resin used in the embodiment is a strong base type quaternary ammonium salt type I anion exchange resin,

[0049] In the embodiment, the resin tank 1 is cylindrical, and the equipment material can be selected from FRP glass steel or PVC or PP material. The resin tank 1 can be connected to the water distribution devices at both ends through bolt sealing connection, and the bolt is made of stainless steel material.

[0050] In some specific embodiments, the first water distribution device 2 includes a water inlet body 4 and a resin bearing body 5 connected thereto. The inside of the water inlet body 4 is filled with buffer filler, which is used to reduce and balance the flow rate of the liquid. For example, the stepped ring filler made of acid-resistant ceramic, PP, and PTFE is used to buffer the entering acid solution, reduce and balance the cross-sectional flow rate, and stabilize the liquid flow rate. The stepped ring filler is a high-efficiency ring-shaped perforated filler, which is a product in the prior art. Here, by arranging the stepped ring filler, a large void ratio and surface area are provided, so that the acid solution can be fully buffered and dispersed when passing through, thereby avoiding local scouring and resin wear caused by too fast flow rate.

[0051] The resin bearing body 5 is connected to the bottom of the resin tank 1, and a filter cloth 51 is arranged in the resin bearing body 5 for supporting the adsorption resin. Optionally, the filter cloth 51 is a woven cloth made of polyester or aramid material with a thickness of 4 mm and a filtering accuracy of 0.05 mm.

[0052] In this way, by filling the buffer filler in the water inlet body 4, the flow rate of the acid solution entering the resin tank 1 can be effectively reduced and balanced. Through the buffering effect of the buffer filler, the acid solution has reached a relatively stable flow rate before entering the resin tank 1, which helps to ensure uniform distribution of the acid solution in the resin tank 1, so that the adsorption resin can fully contact the free acid ions in the acid solution, thereby improving the adsorption efficiency. The filter cloth 51 arranged in the resin bearing body 5 can block the fine resin particles from flowing out of the resin tank 1 with the liquid, preventing the loss of adsorption resin and ensuring the continuity and stability of the adsorption process. Moreover, the presence of the filter cloth 51 can ensure that the acid solution can fully contact the adsorption resin when passing through the resin layer, increasing the adsorption opportunity. At the same time, the filter cloth 51 can also play a certain filtering effect to remove suspended matter and impurities in the acid solution, improving the quality of the acid solution.

[0053] Further, the water inlet body 4 in the embodiment is provided with a water distribution assembly 6 between the water inlet body 4 and the resin carrier 5, the water distribution assembly 6 comprises a first pipe body 61 and first and second water distribution plates 62 and 63 arranged at two ends of the first pipe body 61, the first water distribution plate 62 is sealingly connected with the resin carrier 5, and the surface of the first water distribution plate 62 is uniformly provided with a plurality of first water passing holes 621; the second water distribution plate 63 is sealingly connected with the water inlet body 4, and the surface of the second water distribution plate 63 is uniformly provided with a plurality of second water passing holes 631, and the first water passing holes 621 and the second water passing holes 631 are arranged in a staggered manner.

[0054] As shown in Figures 4-5 , the first and second water distribution plates 62 and 63 are both flange blind plates, and are circular as a whole, and are provided with a circle of through holes at the outer edge for passing through bolts to realize connection with adjacent structures; wherein the first water passing holes 621 on the first water distribution plate 62 are arranged in a staggered manner with the second water passing holes 631 on the second water distribution plate 63, for example, the projection of the first water passing holes 621 on the second water distribution plate 63 is distributed in a staggered triangular shape with the second water passing holes 631.

[0055] In the embodiment, the water inlet body 4 comprises a second pipe body 41 and liquid inlet end and flange plates 42 and 43 arranged at two ends of the second pipe body 41, and the buffer filler is arranged in the second pipe body 41, the liquid inlet end plate 42 is used for supporting the buffer filler, and the middle part of the liquid inlet end plate 42 is connected with the first liquid inlet pipe 21, as shown in Figure 3 , the liquid inlet end plate 42 is a flange blind plate and is circular as a whole, and is provided with two circles of through holes at the outer edge for passing through bolts; the liquid inlet flange plate 43 is annular and is also provided with a circle of through holes, the through holes on the liquid inlet flange plate 43 correspond to the through holes on the second water distribution plate 63, so as to pass through bolts to realize sealing connection with the second water distribution plate 63.

[0056] Referring to Figure 6 , Figure 7 , in the embodiment, the resin carrier 5 further comprises first and second connecting flanges 52 and 53, the outer edge of the first and second connecting flanges 52 and 53 is provided with a circle of through holes, the outer end surface of the first connecting flange 52 is sealingly connected with the bottom of the resin tank 1, and the outer end surface of the second connecting flange 53 is sealingly connected with the outer end surface of the first water distribution plate 62.

[0057] Referring to Figure 8 and Figure 9Specifically, the filter cloth 51 is circular, a mounting ring 511 is arranged around the outer edge of the filter cloth 51, the filter cloth 51 can be sewn on the rubber ring made of PP material by edge sewing around the filter cloth 51, the inner end surface of the second connecting flange 53 is concentrically provided with a first annular groove 531 and a second annular groove 532, the diameter of the first annular groove 531 is smaller than the diameter of the second annular groove 532, the mounting ring 511 is fitted in the first annular groove 531, that is, the rubber ring with the filter cloth 51 is embedded in the first annular groove 531; the second annular groove 532 is used for mounting a sealing ring, and the first connecting flange 52 can press the mounting ring 511 in the first annular groove 531 and press the sealing ring in the second annular groove 532 when the first connecting flange 52 is connected with the second connecting flange 53, that is, the mounting ring 511 and the sealing ring are pressed by clamping installation of the two flanges, which not only realizes the installation of the filter cloth 51, but also realizes the sealing connection of the two flanges through the sealing ring, and can prevent the snap ring and the sealing ring from falling off the annular groove.

[0058] In the embodiment, the first pipe body 61 and the second pipe body 41 are both cylindrical, the resin tank 1, the first pipe body 61 and the second pipe body 41 are concentrically arranged and have the same diameter, both ends of the resin tank 1 are provided with a third connecting flange 11, the outer edge of the third connecting flange 11 is provided with two circles of through holes for connecting with the through holes of the liquid inlet end plate 42 and the first connecting flange 52 through bolts or screws; the third connecting flange 11 is sealingly connected with the first connecting flange 52, that is, one of the outer end surfaces of the first connecting flange 52 or the third connecting flange 11 is a smooth surface, which is convenient for pressing the sealing ring; for example, the outer end surface of the first connecting flange 52 is provided with a third annular groove 521 for mounting a sealing ring, the outer end surface of the third connecting flange 11 is a smooth surface, the sealing ring is mounted in the third annular groove 521, and then the first connecting flange 52 and the third connecting flange 11 are clamped and installed to press the sealing ring, thereby realizing the sealing connection of the third connecting flange 11 and the first connecting flange 52.

[0059] Further, the outer end surface of the first water distribution plate 62 and the outer end surface of the second water distribution plate 63 are both provided with a fourth annular groove for mounting a sealing ring, and correspondingly, the outer end surface of the liquid inlet flange plate 43 is a smooth surface for pressing the sealing ring in the fourth annular groove of the outer end surface of the second water distribution plate 63, thereby realizing the sealing connection of the liquid inlet flange plate 43 and the second water distribution plate 63; the outer end surface of the second connecting flange 53 is a smooth surface for pressing the sealing ring in the fourth annular groove of the outer end surface of the first water distribution plate 62, thereby realizing the sealing connection of the second connecting flange 53 and the first water distribution plate 62.

[0060] As Figure 2As shown, in this embodiment, the overall material of the resin adsorption bed can be FRP fiberglass, PVC, or PP, the bolts are made of stainless steel, and the sealing ring is made of PTFE. The diameter of the liquid inlet end plate 42 is the same as the diameter of the third connecting flange 11. The diameters of the first connecting flange 52, the second connecting flange 53, the first water distribution plate 62, the second water distribution plate 63, and the liquid inlet flange plate 43 are the same, and the diameter of the liquid inlet end plate 42 is larger than the diameter of the liquid inlet flange plate 43. During assembly, the first screw 9 passes sequentially through the through hole of the inner ring of the third connecting flange 11 and the through hole of the first connecting flange 52. The resin tank 1 is fixedly connected to the resin carrier 5, the water distribution assembly 6, and the water inlet 4 by passing through the through holes of the second connecting flange 53, the first water distribution plate 62, the second water distribution plate 63, the liquid inlet flange plate 43, and the inner ring of the liquid inlet end plate 42. Then, the resin tank 1 is fixedly connected to the resin carrier 5, the water distribution assembly 6, and the water inlet 4 by connecting the first screw 9 with the nut. After that, the resin tank 1 is further connected to the resin carrier 5, the water distribution assembly 6, and the water inlet 4 by passing through the through holes of the outer ring of the third connecting flange 11 and the outer ring of the liquid inlet end plate 42 with the second screw 10.

[0061] Similarly, since the second water distribution device 3 has the same structure as the first water distribution device 2, the connection between the top of the resin tank 1 and the resin carrier 5, water distribution component 6 and water inlet 4 in the second water distribution device 3 is the same as described above, and will not be repeated here.

[0062] In this embodiment, a first reinforcing rib 7 and a second reinforcing rib 8 are provided on the outer side of the liquid inlet end plate 42. The first reinforcing rib 7 is distributed in a cross pattern on the surface of the liquid inlet end plate 42. The second reinforcing rib 8 is connected to the first liquid inlet pipe 21 and is used to reinforce the connection between the first liquid inlet pipe 21 and the liquid inlet end plate 42.

[0063] like Figure 3 As shown, the first reinforcing rib plate 7 is fully welded to the surface of the liquid inlet end plate 42 in a grid shape, and the second reinforcing rib plate 8 is welded to the first liquid inlet pipe 21 in a cross shape.

[0064] This utility model embodiment also provides a waste acid recovery system, including multiple waste acid recovery resin adsorption beds connected in series as described above.

[0065] During operation, the waste acid, after coarse and fine filtration, is fed from the bottom into the first waste acid recovery resin adsorption bed. The resulting salt solution then enters the second waste acid recovery resin adsorption bed from the bottom, followed by a third. The ferrous chloride solution, after adsorbing hydrochloric acid, then enters the brine storage tank. This multi-stage setup, using multiple waste acid recovery resin adsorption beds, treats the acid solution in stages. Each stage of the equipment undertakes a portion of the adsorption task, reducing the adsorption load on individual devices. This not only reduces the resin saturation rate but also extends the resin's lifespan, significantly improving the efficiency and effectiveness of waste acid recovery.

[0066] The utility model embodiment further provides a kind of waste acid recovery system, including multiple above-mentioned waste acid recovery resin adsorption bed connected together, since the waste acid recovery system has the waste acid recovery resin adsorption bed described above, therefore has the all advantages of the waste acid recovery resin adsorption bed described above.

[0067] Finally, it should be noted that: the above examples are used to illustrate the technical solutions of the utility model, but not to limit them; Although the utility model has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A waste acid recovery resin adsorption bed characterized by, The application relates to a resin tank (1) filled with adsorbing resin capable of adsorbing acid ions, wherein the particle size of the adsorbing resin is 0.1-0.3 mm. The bottom of the resin tank (1) is connected with a first water distribution device (2), the first water distribution device (2) is provided with a first liquid inlet pipe (21) for supplying acid liquid into the resin tank (1) along the axial direction upwards. The top of the resin tank (1) is connected with a second water distribution device (3), the second water distribution device (3) is provided with a second liquid inlet pipe (31) for supplying washing water into the resin tank (1) along the axial direction downwards. The first water distribution device (2) comprises a water inlet body (4) and a resin supporting body (5) connected with each other, the inside of the water inlet body (4) is filled with buffer filler for reducing and balancing the liquid flow rate; the resin supporting body (5) is connected with the bottom of the resin tank (1), and the resin supporting body (5) is provided with filter cloth (51) for supporting the adsorbing resin.

2. The spent acid recovery resin adsorption bed of claim 1, wherein, A water distribution assembly (6) is arranged between the water inlet body (4) and the resin supporting body (5), the water distribution assembly (6) comprises a first pipe body (61) and first and second water distribution plates (62 and 63) arranged at the two ends of the first pipe body (61), the first water distribution plate (62) is sealingly connected with the resin supporting body (5), and the surface of the first water distribution plate (62) is uniformly provided with a plurality of first water passing holes (621); the second water distribution plate (63) is sealingly connected with the water inlet body (4), the surface of the second water distribution plate (63) is uniformly provided with a plurality of second water passing holes (631), and the first water passing holes (621) and the second water passing holes (631) are arranged in a staggered mode.

3. The spent acid recovery resin adsorption bed of claim 2, wherein, The water inlet body (4) comprises a second pipe body (41) and liquid inlet end and flange plates (42 and 43) arranged at the two ends of the second pipe body (41), the buffer filler is arranged in the second pipe body (41), the liquid inlet end plate (42) is used for supporting the buffer filler, and the middle part of the liquid inlet end plate (42) is connected with the first liquid inlet pipe (21); the liquid inlet flange plate (43) is sealingly connected with the second water distribution plate (63).

4. The spent acid recovery resin adsorption bed of claim 3, wherein, ​ 5. The spent acid recovery resin adsorption bed of claim 4, wherein, The resin carrier (5) further comprises a first connecting flange (52) and a second connecting flange (53), the outer end surface of the first connecting flange (52) is sealingly connected with the bottom of the resin tank (1), and the outer end surface of the second connecting flange (53) is sealingly connected with the outer end surface of the first water distribution plate (62); the filter cloth (51) is circular, an installation ring (511) is arranged around the outer edge of the filter cloth (51), the inner end surface of the second connecting flange (53) is provided with a first annular groove (531) and a second annular groove (532) in a concentric manner, the diameter of the first annular groove (531) is smaller than the diameter of the second annular groove (532), the installation ring (511) is matched with the first annular groove (531), the second annular groove (532) is used for installing a sealing ring, and the first connecting flange (52) can press the installation ring (511) in the first annular groove (531) and press the sealing ring in the second annular groove (532) when connected with the second connecting flange (53).

6. The spent acid recovery resin adsorption bed of claim 1, wherein, The second water distribution device (3) is the same in structure as the first water distribution device (2) and is symmetrically connected at both ends of the resin tank (1), and the resin carrier (5) of the second water distribution device (3) is connected with the top of the resin tank (1).

7. The spent acid recovery resin adsorption bed of claim 5, wherein, The resin tank (1), the first pipe body (61) and the second pipe body (41) are all cylindrical, the resin tank (1), the first pipe body (61) and the second pipe body (41) are concentrically arranged and have the same diameter, and the two ends of the resin tank (1) are provided with third connecting flanges (11), and the third connecting flanges (11) are sealingly connected with the first connecting flanges (52).

8. The spent acid recovery resin adsorption bed of claim 7, wherein, The outer end surface of the first connecting flange (52) or the third connecting flange (11) is provided with a third annular groove (521) for installing a sealing ring; The outer end surface of the first water distribution plate (62) and the outer end surface of the second water distribution plate (63) are both provided with fourth annular grooves for installing sealing rings.

9. The spent acid recovery resin adsorption bed of claim 4, wherein, The outer side of the liquid inlet end plate (42) is provided with a first reinforcing rib plate (7) and a second reinforcing rib plate (8), the first reinforcing rib plate (7) is distributed on the surface of the liquid inlet end plate (42) in a cross shape, and the second reinforcing rib plate (8) is connected with the first liquid inlet pipe (21) and is used for reinforcing the connection between the first liquid inlet pipe (21) and the liquid inlet end plate (42).

10. A spent acid recovery system characterized by, A plurality of waste acid recovery resin adsorption beds connected in series, the waste acid recovery resin adsorption bed is the waste acid recovery resin adsorption bed of any one of claims 1-9.

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