A high-salinity wastewater treatment system

Abstract

This utility model relates to the field of high-salinity wastewater treatment technology, specifically a high-salinity wastewater treatment system. The system includes an adsorption tank and a regeneration furnace. A discharge trough, a first screw conveyor, and a second screw conveyor are provided between the adsorption tank and the regeneration furnace. The adsorption tank is filled with a modified porous inorganic filler adsorbent to adsorb ammonia nitrogen from the raw water, reducing the chemical oxygen demand (COD). The regeneration furnace regenerates the modified porous inorganic filler adsorbent. By combining the adsorption tank and the regeneration furnace, this utility model not only utilizes the excellent adsorption performance of the modified porous inorganic filler adsorbent to efficiently remove ammonia nitrogen from high-salinity wastewater, but also allows the adsorbent, after adsorbing inorganic pollutants, to be transported to the regeneration furnace for regeneration. After regeneration, the adsorbent is then reintroduced into the adsorption tank to continue the adsorption process, forming a dynamic cycle for more efficient and lower-cost treatment of ammonia nitrogen in high-salinity wastewater.

Description

Technical Field

[0001] This utility model relates to the field of high-salinity wastewater treatment technology, specifically a high-salinity wastewater treatment system. Background Technology

[0002] In the implementation of zero-discharge industrial wastewater projects, reverse osmosis (RO) technology, as a key multi-stage concentration method, is widely used for wastewater treatment and purification. Through a multi-stage RO system, various pollutants in wastewater can be effectively separated and concentrated, thereby reducing wastewater discharge. However, after multi-stage concentration treatment, the salt concentration in the wastewater increases significantly, forming high-salinity water. This high-salinity water contains excessive levels of ammonia nitrogen and chemical oxygen demand (COD), which negatively impacts subsequent wastewater treatment systems, affecting their normal operation and treatment effectiveness. Therefore, high-salinity wastewater treatment is necessary to adsorb ammonia nitrogen and reduce the COD in the high-salinity water.

[0003] Although fixed-bed adsorption technology has been widely used in wastewater treatment, traditional porous inorganic packing fixed beds have drawbacks such as relatively low adsorbent utilization, excessively long regeneration cycles, resulting in frequent regeneration operations and high operating costs. Utility Model Content

[0004] The purpose of this invention is to provide a high-salinity wastewater treatment system to solve the problems mentioned in the background art.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A high-salinity wastewater treatment system includes an adsorption tank and a regeneration furnace. A discharge chute, a first screw conveyor, and a second screw conveyor are provided between the adsorption tank and the regeneration furnace. The adsorption tank is filled with a modified porous inorganic filler adsorbent to adsorb ammonia nitrogen in the raw water and reduce the chemical oxygen demand of the raw water. The regeneration furnace is used to regenerate the modified porous inorganic filler adsorbent.

[0007] The adsorption tank transports the modified porous inorganic filler adsorbent inside to the regeneration furnace for regeneration via a discharge chute and a first screw conveyor. The regeneration furnace then transports the regenerated modified porous inorganic filler adsorbent back to the adsorption tank via a second screw conveyor for recycling.

[0008] Preferably, the adsorption tank is provided with an adsorbent output pipe and an adsorbent input pipe, the adsorbent output pipe is connected to the unloading trough, the unloading trough is connected to the first screw conveyor, and the first screw conveyor is connected to the regeneration furnace.

[0009] Preferably, the regeneration furnace is connected to the second spiral conveyor, and the second spiral conveyor is connected to the adsorbent input pipe.

[0010] Preferably, the inlet of the adsorption tank is connected to a raw water booster pump, which is used to input raw water containing modified porous inorganic filler into the regeneration furnace.

[0011] Preferably, a reclaimed water booster pump is connected to the unloading trough. The reclaimed water booster pump is used to input external clean water into the unloading trough to rinse the saturated porous inorganic filler adsorbent.

[0012] Preferably, the regeneration furnace is equipped with rupture discs and flame arresters to prevent the risk of high-temperature deflagration.

[0013] The beneficial effects of this utility model are:

[0014] This invention combines an adsorption tank and a regeneration furnace. It not only utilizes the excellent adsorption performance of the modified porous inorganic filler adsorbent to efficiently remove ammonia nitrogen from high-salinity water, but also allows the modified porous inorganic filler adsorbent, after adsorbing inorganic pollutants, to be transported to the regeneration furnace for regeneration. After regeneration, it is reintroduced into the adsorption tank to continue participating in the adsorption process, forming a dynamic cycle. This achieves more efficient and lower-cost adsorption of ammonia nitrogen from high-salinity water, while preventing the chemical oxygen demand (COD) from exceeding the standard in high-salinity water. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system flow structure of this utility model.

[0017] The attached figures are labeled as follows:

[0018] 1. Adsorption tank; 2. Regeneration furnace; 3. Discharge chute; 4. First screw conveyor; 5. Second screw conveyor; 101. Adsorbent output pipe; 102. Adsorbent input pipe; 6. Raw water lift pump; 7. Regenerated water lift pump. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0020] A high-salt wastewater treatment system includes an adsorption tank 1 and a regeneration furnace 2. The adsorption tank 1 is filled with a modified porous inorganic filler adsorbent to adsorb ammonia nitrogen in the raw water and reduce the chemical oxygen demand of the raw water.

[0021] Long lifespan of porous inorganic filler adsorbents:

[0022] After regeneration, the performance of the porous inorganic filler adsorbent decreases by less than 5% after 10 cycles, resulting in low maintenance costs.

[0023] After 200 regenerations, the modified porous inorganic filler adsorbent retained 87% of its adsorption capacity, while activated carbon retained only 32%.

[0024] The saturated porous inorganic filler adsorbent was treated in a regeneration furnace at 300℃ for 60 minutes, and the adsorption capacity recovery rate after regeneration was ≥95%, with a regeneration energy consumption of 0.8 kWh / kg.

[0025] Regeneration furnace 2 is made of high-temperature resistant alloy material and equipped with dual monitoring via infrared temperature measurement and K-type thermocouples. The regeneration temperature is 300±50℃, and the regeneration time is ≤60 minutes.

[0026] The regeneration waste gas from the regeneration furnace is treated by an external Pt-Pd / honeycomb ceramic catalytic converter (space velocity 10000 h⁻¹). -1 The concentrations of CO and VOCs were reduced to <20 mg / m³, meeting environmental emission standards.

[0027] The adsorption tank 1 is equipped with an adsorbent output pipe 101 and an adsorbent input pipe 102. The adsorbent output pipe 101 is connected to the unloading chute 3, the unloading chute 3 is connected to the first screw conveyor 4, and the first screw conveyor 4 is connected to the regeneration furnace 2, so that the packing material of the adsorption tank 1 is transported to the regeneration furnace 2 for regeneration through the unloading chute 3 and the first screw conveyor 4.

[0028] The regeneration furnace 2 is connected to the second screw conveyor 5, which is also connected to the adsorbent input pipe 102. The regenerated modified porous inorganic filler adsorbent is transported to the adsorption tank 1 for recycling via the second screw conveyor 5.

[0029] The inlet of the adsorption tank 1 is connected to a raw water lift pump 6, which is connected to an external raw water (high-salt wastewater) input pipeline. The raw water lift pump 6 is used to input the external raw water containing modified porous inorganic filler into the regeneration furnace 2.

[0030] A reclaimed water lift pump 7 is connected to the unloading tank 3. The reclaimed water lift pump 7 is connected to an external clean water pipeline. The reclaimed water lift pump 7 is used to input external clean water into the unloading tank 3 to rinse the saturated porous inorganic filler adsorbent.

[0031] The regeneration furnace 2 is equipped with rupture discs and flame arresters to prevent the risk of high-temperature deflagration.

[0032] The working principle of the high-salinity wastewater treatment system provided by this utility model is as follows:

[0033] High-salt wastewater (raw water) is fed into adsorption tank 1 through a raw water booster pump. The modified porous inorganic packing adsorbent inside adsorption tank 1 is used to adsorb ammonia nitrogen from the raw water and reduce the COD (chemical oxygen demand) of the raw water. The wastewater is then transported to the next processing stage as product water.

[0034] After prolonged use, the modified porous inorganic filler adsorbent can be transported to the regeneration furnace 2 via the unloading trough 3 and the first screw conveyor 4 for regeneration. The regenerated modified porous inorganic filler adsorbent is then transported to the adsorption tank 1 via the second screw conveyor 5 for internal recycling, thereby reducing the consumption of the modified porous inorganic filler adsorbent and lowering the cost of removing ammonia nitrogen from the raw water.

[0035] Compared with related technologies, the high-salinity wastewater treatment system provided by this utility model has the following beneficial effects:

[0036] This invention combines an adsorption tank 1 and a regeneration furnace 2. It not only utilizes the excellent adsorption performance of the modified porous inorganic filler adsorbent to efficiently remove ammonia nitrogen from high-salinity water, but also allows the modified porous inorganic filler adsorbent, after adsorbing inorganic pollutants, to be transported to the regeneration furnace 2 for regeneration. After regeneration, it is reintroduced into the adsorption tank 1 to continue participating in the adsorption process, forming a dynamic cycle. This achieves more efficient and lower-cost adsorption of ammonia nitrogen from high-salinity water, while preventing the chemical oxygen demand (COD) from exceeding the standard in high-salinity water.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A high-salinity wastewater treatment system comprising an adsorption tank (1) and a regeneration furnace (2), characterized by, A discharge trough (3), a first screw conveyor (4), and a second screw conveyor (5) are provided between the adsorption tank (1) and the regeneration furnace (2). The adsorption tank (1) is filled with modified porous inorganic filler adsorbent, which is used to adsorb ammonia nitrogen in the raw water and reduce the chemical oxygen demand of the raw water. The regeneration furnace (2) is used to regenerate the modified porous inorganic filler adsorbent. The adsorption tank (1) transports the modified porous inorganic filler adsorbent inside to the regeneration furnace (2) for regeneration through the unloading chute (3) and the first screw conveyor (4). The regeneration furnace (2) then transports the regenerated modified porous inorganic filler adsorbent back to the adsorption tank (1) for recycling through the second screw conveyor (5).

2. The high-salinity wastewater treatment system of claim 1, wherein The adsorption tank (1) is provided with an adsorbent output pipe (101) and an adsorbent input pipe (102). The adsorbent output pipe (101) is connected to the unloading trough (3), the unloading trough (3) is connected to the first screw conveyor (4), and the first screw conveyor (4) is connected to the regeneration furnace (2).

3. The high-salinity wastewater treatment system according to claim 2, characterized in that, The regeneration furnace (2) is connected to the second spiral conveyor (5), and the second spiral conveyor (5) is connected to the adsorbent input pipe (102).

4. The high-salinity wastewater treatment system according to claim 1, characterized in that, The inlet of the adsorption tank (1) is connected to a raw water lift pump (6), which is used to input raw water containing modified porous inorganic filler into the regeneration furnace (2).

5. A high-salinity wastewater treatment system according to claim 2, characterized in that, The unloading trough (3) is connected to a regenerated water lift pump (7), which is used to input external clean water into the unloading trough (3) to rinse the saturated porous inorganic filler adsorbent.

6. The high-salinity wastewater treatment system according to claim 1, characterized in that, The regeneration furnace (2) is equipped with rupture discs and flame arresters to prevent the risk of high-temperature deflagration.

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