CN115432861A - A kind of nuclear crystal condensation induced granulation, salt separation and crystallization water treatment device with seed crystal regeneration system - Google Patents

Abstract

A nuclear crystal condensation-induced granulation salt separation crystallization water treatment device with a seed crystal regeneration system, including a reactor body and a seed crystal regeneration system; the reactor body includes an outer cylinder and an inner cylinder with spacing, and the inner cylinder is connected to the seed crystal Insert pipelines, water inlet pipes, dosing pipes and mud discharge pipes in the inner cylinder. There is a toothed overflow weir in the outer cylinder above the inner cylinder. The position on the wall of the outer cylinder is directly opposite to the bottom of the toothed overflow weir. There is a water outlet pipe on the top, and the bottom of the outer cylinder is connected to the mud discharge pipe of the outer cylinder; the seed crystal regeneration system includes a regeneration chamber, and the built-in filter screen in the regeneration chamber divides the chamber into a regeneration area and a filtrate area, and the regeneration area is set to separate the inner and outer cylinders for solid-liquid separation The water inlet and the nitric acid feed pipe, the inner and outer cylinder mud discharge solid-liquid separation water inlet are connected with the inner cylinder mud discharge pipe and the outer cylinder mud discharge pipe. The invention realizes the advanced treatment and resource utilization of waste water, and the products in the operation process can be directly used as raw materials for other processes, and the use process is simple and fast, saving time and improving efficiency.

Description

A kind of nuclear crystal coagulation induced granulation and salt separation crystallization water treatment with seed crystal regeneration system device

technical field

The invention belongs to the technical field of water quality purification, and relates to a water treatment device for crystallization-induced granulation, salt separation and crystallization, in particular to a water treatment device for crystallization-coagulation-induced granulation, salt separation and crystallization with a seed regeneration system.

Background technique

Industrial wastewater accounts for a relatively large proportion of water environmental pollution, and has become one of the major problems to be solved in environmental work today. Unlike organic matter which can be destroyed by decomposition, heavy metals can only shift their location and change their physical and chemical state. At present, the commonly used heavy metal wastewater treatment methods mainly include chemical precipitation method, reduction method, adsorption method, membrane separation method, coagulation method, ion exchange method, electrochemical method and so on. For the requirements of stable operation, good treatment effect, low investment and operating costs, easy management and operation, and no secondary pollution, the above methods cannot fully meet the requirements. Therefore, there is an urgent need in this field to develop a heavy metal wastewater treatment process that meets the above requirements, while achieving efficient removal of heavy metals, the heavy metals therein are classified, recycled and resource utilized.

Contents of the invention

In order to overcome the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a nuclear crystal coagulation-induced granulation, salt separation and crystallization water treatment device with a seed crystal regeneration system, in order to realize sewage treatment and treatment product classification with an integrated structure Recycling and resource utilization.

In order to achieve the above object, the technical scheme adopted in the present invention is:

A nuclear crystal condensation-induced granulation salt separation crystallization water treatment device with a seed crystal regeneration system, including a reactor body and a seed crystal regeneration system;

The reactor body includes an outer cylinder and an inner cylinder, the inner cylinder is arranged in the middle and lower part of the outer cylinder with a distance between them, and the inner cylinder is connected with the seed crystal insertion pipeline, the water inlet pipe, and the dosing pipe As well as the mud discharge pipe of the inner cylinder, a toothed overflow weir is arranged in the outer cylinder above the inner cylinder, and a water outlet pipe is arranged on the wall of the outer cylinder at a position opposite to the bottom of the toothed overflow weir, and the bottom of the outer cylinder Connect the mud discharge pipe of the outer cylinder;

The seed crystal regeneration system includes a regeneration chamber, and the built-in filter screen in the regeneration chamber divides the chamber into a regeneration zone and a filtrate zone. The regeneration zone is provided with an inner and outer cylinder mud discharge solid-liquid separation inlet and a nitric acid feed pipe. The mud discharge solid-liquid separation water inlet of the inner and outer cylinders is connected with the mud discharge pipe of the inner cylinder and the mud discharge pipe of the outer cylinder.

In one embodiment, the seed crystal insertion pipeline is a hopper, the hopper is arranged vertically, the inlet end is located at the top of the outer cylinder, and the outlet end is located at the upper middle of the inner cylinder.

In one embodiment, the water inlet flow rate of the water inlet pipe makes the crystal seeds in the inner cylinder in a suspended state, and the dosing pipe is used to inject alkaline reagents, so that the reaction continues in the reactor body, and the crystal seeds are in the reactor body. The filling height in the inner cylinder is 10%-15% of the effective height of the device, which refers to the longitudinal distance between the water inlet pipe and the water outlet pipe.

In one embodiment, the bottom of the inner cylinder is conical, the water inlet pipe and the dosing pipe are horizontally connected to the lower part of the inner cylinder, and the inner cylinder mud discharge pipe is vertically connected to the bottom of the inner cylinder.

In one embodiment, the water inlet pipe and the medicine feeding pipe are on the same horizontal plane, and both are connected tangentially to the inner cylinder.

In one embodiment, the outer cylinder mud discharge pipe is arranged horizontally.

In one embodiment, the bottom of the outer cylinder is connected to a backflow water outlet pipe, the bottom of the inner cylinder is connected to a circulating water inlet pipe, the backflow water outlet pipe is connected to the circulating water inlet pipe, and the circulating water inlet pipe is connected to the circulating water inlet pipe. The inner barrel is connected tangentially.

In one embodiment, the seed regeneration system is located below the entire reactor body.

In one embodiment, the nitric acid feed pipe feeds dilute nitric acid with a mass concentration of 10-15% to the regeneration zone.

In one embodiment, each part of the seed crystal regeneration system is coated with a coating for preventing nitric acid corrosion.

Compared with prior art, the beneficial effect of the present invention is:

1. The integration of the reactor body and the regeneration system realizes the continuous operation of the removal of heavy metal ions in wastewater, the regeneration of crystal seeds, and the classification and recovery of heavy metal ions.

2. The technological process is greatly shortened, the occupied area is reduced, the work efficiency is improved, and the economic benefit is indirectly improved.

3. The device is easy to operate, has a high degree of automation, and has strong adaptability to complex water bodies.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a sectional view along A-A in Fig. 1 .

Fig. 3 is a sectional view along B-B in Fig. 1 .

Fig. 4 is a sectional view along line C-C in Fig. 1 .

reference sign

In the figure: 1. Outer cylinder; 2. Hopper; 3. Inner cylinder; 4. Water inlet pipe; 5. Dosing pipe; 6. Circulating water inlet pipe; 7. Inner cylinder mud discharge pipe; 8. Outer cylinder mud discharge pipe 9. Backflow water outlet pipe; 10. Inlet for solid-liquid separation of inner and outer cylinders; 11. Nitric acid feed pipe; 12. Filter screen; 13. Leachate discharge pipe; 14. Toothed overflow weir; water pipe.

detailed description

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the described embodiments are some, not all, embodiments of the present invention. The specific embodiments described here are only used to explain the present invention, but not to limit the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention belong to the protection scope of the present invention.

As mentioned above, the existing nuclear crystal coagulation-induced granulation, salt separation and crystallization water treatment equipment can effectively realize the efficient removal and classified recovery of heavy metal ions in wastewater, but the economic benefits generated by the used seed crystals are still low , and because the seed crystal has the characteristic of selectively inducing granulation to heavy metal ions in wastewater, it is necessary to realize the recovery and reuse of the crystal seed and the classified recovery and resource utilization of heavy metal ions, reduce the process flow, and increase the operability of the device sex.

Based on this, the present invention integrates the reactor body and the seed crystal regeneration system. In this integrated device, the efficient removal of heavy metal ions in wastewater, the regeneration of seed crystals, and the resource utilization of heavy metal ions can be realized simultaneously, thereby improving Work efficiency, reduce floor space, improve economic benefits.

The meaning of "nuclear crystal coagulation-induced granulation and salt separation and crystallization water treatment" in the present invention is as follows: nuclear crystal coagulation-induced granulation refers to adding crystal seeds and alkaline chemicals to the water body, and optimizing and adjusting the hydraulic parameters to induce water in the water body. The heavy metal ions crystallize and precipitate on the surface of the seed crystals, so as to achieve the purpose of removing heavy metal ions in the water body; the salt-splitting crystallization refers to the selective induction of heavy metal ions of the same attribute in the composite water body through the addition of seeds with different attributes and characteristics. The surface of the characteristic seed crystal is crystallized and precipitated, so as to achieve the purpose of stepwise removal of different heavy metal ions. In the present invention, the used crystal seeds can be metal oxide modified anion exchange resins, or other types of crystal seeds.

The present invention's nuclear crystal coagulation induced granulation salt separation crystallization water treatment device with a seed crystal regeneration system mainly includes a reactor body and a seed crystal regeneration system, as shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4:

The reactor body mainly includes an outer cylinder 1 and an inner cylinder 3. The inner cylinder 3 is arranged in the outer cylinder 1, preferably in the middle and lower part, and there should be a distance between the outer wall of the inner cylinder 3 and the inner wall of the outer cylinder 1. The inner cylinder 3 is connected with the seed crystal insertion pipeline 2, the water inlet pipe 4, the drug dosing pipe 5 and the inner cylinder mud discharge pipe 7, respectively realizing seed crystal addition, water intake, dosing and mud discharge. A tooth-shaped overflow weir 14 is arranged inside the outer cylinder 1, and the tooth-shaped overflow weir 14 is located above the inner cylinder 3 and can function as a filter. A water outlet pipe 15 is arranged on the wall of the outer cylinder 1, and the outlet pipe 15 is directly opposite to the bottom of the toothed overflow weir 14, and the bottom of the outer cylinder 1 is connected with the mud discharge pipe 8 of the outer cylinder.

The seed crystal regeneration system mainly includes a regeneration chamber 16, which has a built-in filter screen 12, and the filter screen 12 divides the cavity into a regeneration area and a filtrate area. The regeneration zone is provided with an inner and outer cylinder mud discharge solid-liquid separation water inlet 10 and a nitric acid feed pipe 11, wherein the inner and outer cylinder mud discharge solid-liquid separation water inlet 10 is connected with the inner cylinder mud discharge pipe 7 and the outer cylinder mud discharge pipe 8.

During the operation of the reactor, the sludge and other substances produced in the inner cylinder 3 and the outer cylinder 1 are injected into the seed crystal regeneration system through the inner and outer cylinder mud discharge solid-liquid separation inlet 10 under the action of the peristaltic pump, and are carried out through the filter screen 12. Solid-liquid separation, wherein the peristaltic pump is connected with each nozzle through a silicone tube. In the regeneration zone, the filter screen 12 retains the obtained sludge, and under the action of nitric acid injected from the nitric acid feeding pipe 11, the precipitation on the surface of the sludge particles is gradually dissolved. Exemplarily, what nitric acid selects for use is that concentration is 10-15% dilute nitric acid, the ratio of the consumption of nitric acid and the content of target pollutant in the water body is 1.5:1 (molar ratio), and the consumption of nitric acid should not exceed too much, otherwise it will Cause damage to the regeneration seed and lead to the presence of impurity ions in the leachate.

In one embodiment of the present invention, the seed crystal insertion pipeline 2 is a hopper, the hopper is vertically arranged, the inlet end is located at the top of the outer cylinder 1, and the outlet end is located at the middle and upper part of the inner cylinder 3 for filling into the inner cylinder 3 Seed. Wherein the inner cylinder 3 can be fixed in the outer cylinder 1 by two steel plates.

In one embodiment of the present invention, the bottom of the inner cylinder 3 is conical, the water inlet pipe 4 and the dosing pipe 5 are horizontally connected to the lower part of the inner cylinder 3, and the inner cylinder mud discharge pipe 7 is vertically connected to the bottom of the inner cylinder 3 . For example, the water inlet pipe 4 and the dosing pipe 5 are on the same horizontal plane, and both are connected tangentially to the inner cylinder 3. The tangential water inlet helps the uniform mixing of the medicine and the raw water, thereby improving the treatment effect of wastewater.

In one embodiment of the present invention, a filter screen is provided on the toothed overflow weir 14 to further filter out impurities, and finally the outlet water is discharged from the outlet pipe 15 .

In one embodiment of the present invention, the water inlet flow rate of the water inlet pipe 4 makes the crystal seeds in the inner cylinder 3 in a suspended state, and the dosing pipe 5 is used to inject alkaline chemicals, so that the reaction continues in the reactor body, and the crystal seeds in the inner cylinder 3 are suspended. The filling height of the seeds in the inner cylinder 3 is 10%-15% of the effective height of the device. In the present invention, the effective height of the device refers to the longitudinal distance between the water inlet pipe 4 and the water outlet pipe 15 .

In one embodiment of the present invention, the outer cylinder mud discharge pipe 8 is arranged horizontally.

In one embodiment of the present invention, the bottom of the outer cylinder 1 is connected to the backflow water outlet pipe 9, the bottom of the inner cylinder 3 is connected to the circulating water inlet pipe 6, the backflow water outlet pipe 9 is connected to the circulating water inlet pipe 6, and the circulating water inlet pipe 6 is connected to the The inner cylinder 3 is connected tangentially.

In one embodiment of the present invention, the seed regeneration system is located below the entire reactor body.

In one embodiment of the present invention, each part in the seed crystal regeneration system is coated with a coating for preventing nitric acid corrosion. Exemplarily, the anti-corrosion paint may be KN22 strong oxidation resistant paint, or ZS-1032 strong oxidation resistant paint.

Processing flow of the present invention is as follows:

First fill the inner cylinder 3 with seed crystals, for example, 15% of the effective height of the device can be filled; then inject waste water through the water inlet pipe 4, and adjust the flow rate to keep the crystal seeds in a suspended state, and then inject alkaline agents through the dosing pipe 5 , so that the reaction continues in the reactor, and the reacted outlet water flows out from the outlet pipe 15 after passing through the toothed overflow weir 14 . The material discharged from the inner cylinder mud discharge pipe 7 and the outer cylinder mud discharge pipe 8 enters the seed regeneration system through the solid-liquid separation inlet 10 of the inner and outer cylinders, and the solid-liquid separation is carried out through the filter screen 12 in the seed regeneration system. , inject nitric acid through the nitric acid feeding pipe 11 to make it react with the sludge in the seed crystal regeneration zone, for example, the concentration of nitric acid is 10%. Finally, the regenerated seed crystal and the nitrate solution containing a single heavy metal ion are obtained, and the classified recovery and resource utilization of the products are realized.

In the present invention, the tooth-shaped overflow weir 14 is mainly used to ensure the uniform overflow of the liquid and to achieve the effect of solid-liquid separation. The granulation reaction induced by nuclei crystal condensation mainly occurs in the inner cylinder 3, and the heavy metal ions and alkali in the water body The active agent precipitates and adheres to the surface of the seed crystal, thereby forming a dense granule that enters the seed crystal regeneration system and reacts with the nitric acid in the seed crystal regeneration system to realize the regeneration of the seed crystal and the recovery of heavy metal ions. The nitrate solution containing heavy metal ions is discharged from the leachate discharge pipe 13.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or equivalent replacements are made to some 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 various embodiments of the present invention.

Claims (10)

1. A nuclear crystal coagulation-induced granulation salt separation crystallization water treatment device with a seed regeneration system, characterized in that it includes a reactor body and a seed regeneration system; The reactor body includes an outer cylinder (1) and an inner cylinder (3), the inner cylinder (3) is arranged in the middle and lower part of the outer cylinder (1) with a distance between them, and the inner cylinder (3) ) to connect the seed crystal insertion pipeline (2), the water inlet pipe (4), the dosing pipe (5) and the inner cylinder mud discharge pipe (7), and the outer cylinder (1) is located above the inner cylinder (3) A toothed overflow weir (14) is provided, and an outlet pipe (15) is provided on the wall of the outer cylinder (1) facing the bottom of the toothed overflow weir (14), and the bottom of the outer cylinder (1) is connected to the outer Cylinder mud discharge pipe (8); The seed crystal regeneration system includes a regeneration chamber (16). The regeneration chamber (16) has a built-in filter screen (12) to divide the chamber into a regeneration zone and a filtrate zone. A water inlet (10) and a nitric acid feed pipe (11), the inner and outer cylinder mud discharge solid-liquid separation water inlet (10) are connected with the inner cylinder mud discharge pipe (7) and the outer cylinder mud discharge pipe (8). 2. The nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with the seed crystal regeneration system according to claim 1 is characterized in that, the described seed crystal insertion pipeline (2) is a hopper, and the hopper is vertically Set up straight, the inlet end is located at the top of the outer cylinder (1), and the outlet end is located at the middle and upper part of the inner cylinder (3). 3. according to claim 1 or 2 described nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with seed crystal regeneration system, it is characterized in that, the water inlet flow rate of described water inlet pipe (4) makes inner cylinder (3 ) in a suspended state, the dosing tube (5) is used to inject alkaline reagents, so that the reaction continues in the reactor body, and the filling height of the seed crystal in the inner cylinder (3) is at least 10%-15% of the effective height, the effective height of the device refers to the longitudinal distance between the water inlet pipe (4) and the water outlet pipe (15). 4. according to the described nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with seed crystal regeneration system of claim 1, it is characterized in that, the bottom of described inner tube (3) is conical, and described inlet pipe ( 4) and the dosing pipe (5) are horizontally connected to the bottom of the inner cylinder (3), and the inner cylinder mud discharge pipe (7) is vertically connected to the bottom of the inner cylinder (3). 5. The nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with the seed crystal regeneration system according to claim 4 is characterized in that, the water inlet pipe (4) and the dosing pipe (5) are at the same level, And both are tangentially connected with the inner cylinder (3). 6. The nuclear crystal coagulation-induced granulation, salt separation and crystallization water treatment device with a seed crystal regeneration system according to claim 1, characterized in that, the outer cylinder mud discharge pipe (8) is arranged horizontally. 7. The nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with the seed crystal regeneration system according to claim 1 is characterized in that, the bottom of the outer cylinder (1) is connected to the backflow water outlet pipe (9), and the The bottom of the inner cylinder (3) is connected to the circulating water inlet pipe (6), the backflow water outlet pipe (9) is connected to the circulating water inlet pipe (6), and the circulating water inlet pipe (6) is connected to the inner cylinder ( 3) Tangential connection. 8. The nuclear crystal condensation-induced granulation salt separation crystallization water treatment device with a seed crystal regeneration system according to claim 1, characterized in that, the seed crystal regeneration system is located below the entire reactor body. 9. The nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with the seed crystal regeneration system according to claim 1 is characterized in that, the nitric acid feed pipe (11) is sent into the regeneration zone with a mass concentration of 10 -15% dilute nitric acid. 10. according to the described nuclear crystal coagulation induction granulation salt separation crystallization water treatment device with seed crystal regeneration system of claim 1, it is characterized in that, each part in the described seed crystal regeneration system is all coated with one deck and is used to prevent Coatings corroded by nitric acid.

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