Integrated softening, silicon removal and recycling system

Abstract

The utility model discloses an integrated softening and desilicication recycling system, which belongs to the field of water treatment and comprises a softening granulation group, a desilicication reaction group, a coagulation turbidity removal group, a filtering group and a seed crystal medicament adding group, the softening and granulating group comprises a softening and granulating suspended bed and a buffer circulating pool, a circulating pump is arranged on a communicating pipeline of the bottom of the softening and granulating suspended bed and the bottom of the buffer circulating pool, liquid at the top of the softening and granulating suspended bed can flow into the raw water pool or the buffer circulating pool, and incoming water is input into the bottom of the softening and granulating suspended bed; the silicon removal reaction group is used for adjusting alkalinity and adding a silicon removal agent to remove silicon; a silicon removal process is connected in series after a crystallization, granulation and softening technology, and silicon removal treatment is performed on water through a pH adjusting tank and a silicon removal tank in a silicon removal reaction group, so that the content of silicate in the water is effectively reduced, and the problem of silicate scaling caused by the fact that crystallization and softening effluent enters subsequent ultrafiltration and reverse osmosis devices is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to water treatment technical field, concretely relates to a kind of integrated softening silicon-removing resource system. BACKGROUND

[0002] Industrial circulating cooling water is concentrated due to evaporation in the running process, causing the concentration of calcium ions, magnesium ions, carbonate ions, silicate ions and other ions in water to increase, leading to water quality deterioration. The increase of salt concentration in water can cause scale and salt scale to form on the pipe wall and equipment surface, causing serious consequences for industrial production. Generally, in the electrochemical water project, if the pre-removal of hardness process is not in place, it will directly cause the process containing membrane system to be blocked and scaled, thereby affecting the treatment efficiency. At present, the traditional hardness removal process includes chemical precipitation method and ion exchange method. Although these processes are mature, widely used and have high removal rate, they produce a large amount of sludge, which needs to be treated regularly after dewatering, and the ion exchange method is not suitable for high-salinity wastewater. In the regeneration process, a large amount of acid and alkali reagents are consumed, and secondary pollution exists. Therefore, softening granulation technology is used, which has high calcium removal efficiency, small occupation area, less sludge and recyclable by-products. However, most of the existing softening granulation technologies do not have silicon removal function, and high-hardness wastewater generally has high silicon content. Silicon combines with hardness components such as calcium and magnesium to form hard scale inside the equipment. Therefore, an integrated softening silicon-removing resource system is proposed to reduce the risk of system scaling. SUMMARY

[0003] The utility model aims at providing an integrated softening silicon-removing resource system to solve the problem that most of the existing softening granulation technologies do not have silicon removal function, high-hardness wastewater generally has high silicon content, and is easy to form scale inside the system.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: an integrated softening silicon-removing resource system, which comprises a softening granulation group, a silicon removal reaction group, a coagulation and turbidity removal group, a filtration group and a seed agent dosing group.

[0005] The softening granulation group comprises a softening granulation suspended bed and a buffer circulation tank. A circulating pump is arranged on the connecting pipeline between the bottom of the softening granulation suspended bed and the bottom of the buffer circulation tank. The liquid at the top of the softening granulation suspended bed can flow into the raw water tank or the buffer circulation tank. The softening granulation suspended bed is supplied with incoming water.

[0006] The silicon removal reaction group comprises a pH adjustment tank and a silicon removal tank. The pH adjustment tank is connected to the bottom pipeline of the silicon removal tank. Stirring machines are arranged in the pH adjustment tank and the silicon removal tank.

[0007] The coagulation and turbidity removal group removes silicon, magnesium and turbidity by adding flocculants and coagulants; the filtration group adjusts the water to neutral pH and filters;

[0008] The seed agent adding group comprises seed adding members, alkali agent adding members and sodium carbonate adding members, which can add seeds, alkali and sodium carbonate into the softening and granulating suspension bed respectively.

[0009] Further, a first pH on-line detector and a calcium ion on-line detector are arranged on the pipeline connecting the top of the softening and granulating suspension bed and the top of the buffer circulation tank.

[0010] Further, alkali agent adding members and a second pH on-line detector are arranged on the pH adjustment tank.

[0011] Further, the coagulation and turbidity removal group comprises a flocculation tank, a coagulation tank and a sedimentation tank connected in sequence, the effluent of the desilication tank overflows into the flocculation tank from the top, a stirrer and flocculant adding members are arranged on the flocculation tank, the effluent of the flocculation tank flows into the bottom of the coagulation tank through the pipeline connecting the bottom of the flocculation tank and the coagulation tank, and the coagulation tank contains PAM agent adding members and a stirrer.

[0012] Further, the effluent in the inner cavities of the flocculation tank, the coagulation tank and the sedimentation tank flows into the wastewater tank.

[0013] Further, a mud scraper and an inclined plate are arranged in the sedimentation tank, and the bottom of the sedimentation tank is connected to a sludge treatment system.

[0014] Further, the filtration group comprises a neutralization tank and a filter, the neutralization tank is provided with a stirrer, acid agent adding members and a third pH on-line detector, and the filter contains a filter material layer.

[0015] Compared with the prior art, the integrated softening and desilication resource system has the following beneficial effects:

[0016] The integrated softening and desilication resource system is connected in series with a desilication process after the crystallization and granulation softening technology, and the pH adjustment tank and the desilication tank in the desilication reaction group are used to desilicate the water, so that the content of silicate in the water is effectively reduced, thereby solving the silicate scaling problem caused by the crystallization and softening effluent entering the subsequent ultrafiltration and reverse osmosis device.

[0017] The integrated softening and desilication resource system adopts the crystallization and granulation softening technology in the softening process, the generated particles can be discharged and collected for secondary resource utilization, and the amount of sludge generated is greatly reduced compared with the traditional chemical precipitation method.

[0018] The integrated softening and silicon removal and resource utilization system integrates softening and granulation, silicon removal, coagulation and turbidity removal and filtration, and does not rely on ion exchange, thereby avoiding the problem that ion exchange is not applicable to high-salinity wastewater.

[0019] The integrated softening and silicon removal and resource utilization system processes water through the coagulation and turbidity removal group and the filtration group, in the coagulation and turbidity removal group, the silicon colloid substances and fine suspended matters in the wastewater are aggregated into large particles through the addition of flocculants and coagulants, and the silicon, magnesium and other ions and turbidity are removed through the inclined plate sedimentation in the sedimentation tank, then in the filtration group, the water is adjusted to neutral pH through the neutralization tank, and then the suspended particles are adsorbed through the filter material layer, effectively reducing the suspended matter content of the ultrafiltration inlet water and reducing the frequency of membrane system backwashing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an integrated softening and silicon removal and resource utilization system.

[0021] In the figure: 10, softening and granulation group; 110, softening and granulation suspended bed; 120, buffer circulation tank; 130, circulation pump; 140, first pH online detection instrument; 150, calcium ion online detection instrument; 20, silicon removal reaction group; 210, pH adjustment tank; 211, second pH online detection instrument; 220, silicon removal tank; 30, coagulation and turbidity removal group; 310, flocculation tank; 320, coagulation tank; 321, wastewater tank; 330, sedimentation tank; 331, mud scraper; 332, inclined plate; 40, filtration group; 410, neutralization tank; 411, third pH online detection instrument; 420, filter; 421, filter material layer; 510, seed addition device; 520, alkali agent addition device; 530, sodium carbonate addition device; 540, silicon and magnesium and aluminum addition device; 550, flocculant addition device; 560, PAM agent addition device; 570, acid agent addition device. DETAILED DESCRIPTION

[0022] The utility model will be further described below in combination with examples.

[0023] The following examples are used to illustrate the utility model, but cannot be used to limit the protection scope of the utility model. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements of the method of the utility model under the concept of the utility model all belong to the range required to be protected by the utility model.

[0024] Please refer to Figure 1 The utility model provides an integrated softening and silicon removal and resource utilization system, including softening and granulation group 10, silicon removal reaction group 20, coagulation and turbidity removal group 30, filtration group 40, seed agent addition group.

[0025] The softening and granulation group 10, the silicon removal reaction group 20, the coagulation and turbidity removal group 30 and the filtration group 40 are arranged from left to right.

[0026] The softening and granulation group 10 comprises a softening and granulation suspension bed 110 and a buffer circulation pool 120. A circulation pump 130 is arranged on a pipeline connecting the bottom of the softening and granulation suspension bed 110 and the bottom of the buffer circulation pool 120. A first pH on-line detector 140 and a calcium ion on-line detector 150 are arranged on a pipeline connecting the top of the softening and granulation suspension bed 110 and the top of the buffer circulation pool 120. Liquid at the top of the softening and granulation suspension bed 110 can flow into the raw water pool or the buffer circulation pool 120 through a valve. Water can be input at the bottom of the softening and granulation suspension bed 110.

[0027] The seed agent adding group comprises a seed adding device 510, an alkali agent adding device 520 and a sodium carbonate adding device 530. The seed adding device 510, the alkali agent adding device 520 and the sodium carbonate adding device 530 can add seeds, alkali and sodium carbonate into the softening and granulation suspension bed 110 according to requirements.

[0028] The seed agent adding group provides a crystallization induction environment for the softening and granulation group 10, and the generated particles are collected. The buffer circulation pool 120 is used for external circulation of the softening and granulation group 10. The circulation water of the circulation pump 130 adjusts the upward flow rate in the softening and granulation suspension bed 110 and changes the flow state in the suspension bed. The adding amount of the alkali agent adding device 520 of the softening and granulation group 10 is adjusted according to the first pH on-line detector 140. The calcium ion on-line detector 150 detects the effluent effect of the softening and granulation suspension bed 110. If the calcium removal effect is not ideal, the water is returned to the raw water pool.

[0029] The silicon removal reaction group 20 comprises a pH adjustment pool 210 and a silicon removal pool 220. The pH adjustment pool 210 is connected to the bottom of the silicon removal pool 220 through a pipeline. The pH adjustment pool 210 is provided with an alkali agent adding device 520, a second pH on-line detector 211 and a stirrer. The silicon removal pool 220 is provided with a silicon removal magnesium-aluminum adding device 540 and a stirrer. The pH adjustment pool 210 is used to adjust the alkalinity value to meet the silicon removal reaction, and then enters the silicon removal pool 220 to form insoluble colloidal suspensions by adding the silicon removal magnesium-aluminum agent.

[0030] The coagulation and turbidity removal group 30 comprises a flocculation tank 310, a coagulant aid tank 320 and a sedimentation tank 330 connected in sequence, the effluent of the silicon removal tank 220 overflows to the flocculation tank 310 from the top, the flocculation tank 310 is provided with a stirrer and a flocculant dosing device 550, the effluent of the flocculation tank 310 flows to the bottom of the coagulant aid tank 320 through a tank bottom communication pipeline, the coagulant aid tank 320 contains a PAM dosing device 560 and a stirrer, the flocculated wastewater flows to the sedimentation tank 330 from the top of the coagulant aid tank 320, the wastewater at the bottom of the inner cavities of the flocculation tank 310, the coagulant aid tank 320 and the sedimentation tank 330 is combined and can flow into a wastewater tank 321, the inside of the sedimentation tank 330 is provided with a mud scraper 331 and an inclined plate 332, and the bottom of the sedimentation tank 330 is connected to a sludge treatment system. By adding flocculants and coagulant aids, the silica colloidal substances and fine suspended solids in the wastewater are aggregated into large particles, and the removal of silicon, magnesium ions and turbidity is realized by sedimentation in the sedimentation tank 330 through the inclined plate 332.

[0031] The filter group 40 comprises a neutralization tank 410 and a filter 420, the neutralization tank 410 is provided with a stirrer, an acid dosing device 570 and a third pH on-line detector 411, and the filter 420 contains a filter material layer 421; in order to prevent the influence of alkaline liquid on the filter material in the subsequent filter 420, the neutralization tank 410 is adjusted to neutral pH water. The water flows into the filter 420 through the filter material layer 421, and the residual suspended particles in the water are attached and intercepted on the surface of the filter material and then enter the subsequent system.

[0032] The working principle and use process of the utility model are as follows: firstly, the crystal seeds are added to the softening and granulation suspended bed 110, then the alkali dosing device 520 and the sodium carbonate dosing device 530 are simultaneously added to the softening and granulation suspended bed 110, the crystal seeds, water, alkali and sodium carbonate simultaneously contact to generate particles, the generated particles are discharged and collected for secondary resource utilization. The effluent is discharged from the top of the softening and granulation suspended bed 110, the effluent outlet is provided with a first pH on-line detector 140 and a calcium ion on-line detector 150, during the debugging, the alkalinity condition of the softening and granulation can be adjusted according to the first pH on-line detector 140 of the effluent outlet of the softening and granulation suspended bed 110, the hardness removal effect of the softening and granulation is reflected according to the calcium ion on-line detector 150, if it does not meet the standard, the valve entering the buffer circulation tank 120 is closed and the valve entering the raw water tank is opened. The water with qualified calcium removal effect enters the buffer circulation tank 120, part of the water in the buffer circulation tank 120 is circulated into the side of the softening and granulation suspended bed 110 through the circulating pump 130, the water inflow speed of the softening and granulation suspended bed 110 is adjusted and the flow state in the softening and granulation suspended bed 110 is changed.

[0033] The effluent in the buffer circulation pool 120 enters the pH adjustment pool 210 of the silicon removal reaction group 20, the dosage of the alkali agent adding device 520 is adjusted according to the second pH on-line detection instrument 211 on the pH adjustment pool 210, the wastewater enters the silicon removal pool 220 from the bottom pipeline of the pH adjustment pool 210, and the silicon removal reaction is realized by adding the silicon removal magnesium aluminum in the silicon removal pool 220.

[0034] The water after the silicon removal reaction enters the flocculation pool 310, the coagulation aid pool 320 and the sedimentation pool 330 of the coagulation and turbidity removal group 30 in sequence, the flocculating agent is added in the flocculation pool 310 to cause particle coagulation, the PAM agent is added in the coagulation aid pool 320 to promote the coagulation reaction to form large particle alum flowers, and the particle sedimentation occurs under the action of the inclined plate 332 in the sedimentation pool 330.

[0035] The water enters the neutralization pool 410 of the filtration group 40, the dosage of the acid agent adding device 570 is adjusted according to the value of the third pH on-line detection instrument 411 on the neutralization pool 410, the water is adjusted to neutral pH, and then enters the filter 420 to realize filtration, and then enters the subsequent process after being adsorbed by the filter material layer 421.

[0036] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated softening desilication resource recovery system characterized by: It comprises a softening and granulating group (10), a silicon removing reaction group (20), a coagulation and turbidity removal group (30), a filtering group (40), and a seed agent adding group; The softening and granulating group (10) comprises a softening and granulating suspension bed (110) and a buffer circulation pool (120), a circulation pump (130) is arranged on a pipeline connecting the bottom of the softening and granulating suspension bed (110) and the bottom of the buffer circulation pool (120), liquid can flow into the raw water pool or the buffer circulation pool (120) from the top of the softening and granulating suspension bed (110), and incoming water is input into the bottom of the softening and granulating suspension bed (110); The silicon removing reaction group (20) comprises a pH adjusting pool (210) and a silicon removing pool (220), the pH adjusting pool (210) is connected to the silicon removing pool (220) through a pipeline, and a stirrer is arranged in each of the pH adjusting pool (210) and the silicon removing pool (220); The coagulation and turbidity removal group (30) removes silicon ions, magnesium ions and turbidity by adding flocculants and coagulants, and the filtering group (40) adjusts the water to neutral pH and filters the water. The seed agent adding group comprises seed adding members (510), alkali agent adding members (520) and sodium carbonate adding members (530), which can add seeds, alkali and sodium carbonate into the softening and granulating suspension bed (110) respectively.

2. The integrated softening desilicating resource recovery system of claim 1, wherein: A first pH on-line detector (140) and a calcium ion on-line detector (150) are arranged on a pipeline connecting the top of the softening and granulating suspension bed (110) and the top of the buffer circulation pool (120).

3. The integrated softening desilicating resource recovery system of claim 1, wherein: The pH adjusting pool (210) is provided with alkali agent adding members (520) and a second pH on-line detector (211).

4. The integrated softening desilicating resource recovery system of claim 1, wherein: The coagulation and turbidity removal group (30) comprises a flocculation pool (310), a coagulation pool (320) and a sedimentation pool (330) connected in sequence, a stirrer and flocculant adding members (550) are arranged on the flocculation pool (310), the effluent of the flocculation pool (310) flows to the bottom of the coagulation pool (320) through a pipeline, and the coagulation pool (320) contains PAM agent adding members (560) and a stirrer.

5. The integrated softening desilicating resource recovery system of claim 4, wherein: The waste water in the inner cavities of the flocculation pool (310), the coagulation pool (320) and the sedimentation pool (330) flows into a waste water pool (321).

6. The integrated softening desilicating resource recovery system of claim 4, wherein: The sedimentation pool (330) is provided with a mud scraper (331) and an inclined plate (332) in the inside, and the bottom of the sedimentation pool (330) is connected to a sludge treatment system.

7. The integrated softening desilicating resource recovery system of claim 1, wherein: The filtering group (40) comprises a neutralization pool (410) and a filter (420), the neutralization pool (410) is provided with a stirrer, acid agent adding members (570) and a third pH on-line detector (411), and the filter (420) contains a filter material layer (421).

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