one. Product Features

Ammonia nitrogen exists in water bodies in the form of ionic ammonium (NH4+) and free ammonia (NH3)2, mainly from industrial wastewater (such as coking wastewater, monosodium glutamate wastewater, etc.) and urban domestic sewage, and part of it comes from the decomposition of protein in natural water bodies Or the conversion of nitrite nitrogen and nitrate nitrogen under certain conditions.

NH³ is a colorless and irritating alkaline gas, which is easily soluble in water. NH3 in water has a toxic effect on aquatic organisms. The toxic dose to fish is 2.1×10-2mg/L, and it is also harmful to humans. Quite harmful, it can enter the body to synthesize nitroso compounds and induce cancer.

The ammonia nitrogen removal equipment adopts a new type of active molecular sieve to remove ammonia nitrogen filter material. When water flows from the active molecular sieve to remove ammonia nitrogen filter material, NH4+ cations are exchanged with the active molecular sieve ammonia nitrogen removal filter material to achieve the purpose of removing ammonia nitrogen ions.

two. Scope of application

1. It is suitable for the removal of ammonia and nitrogen in groundwater and purified water;
2. Suitable for the removal of ammonia and nitrogen from industrial wastewater and sewage;
3. Widely used in swimming pools to remove urea and reduce turbidity;
4. Suitable for removing ammonia nitrogen and peculiar smell in landscape water;
5. It is suitable for the circulating purification of bathing water, the purification of algae in rivers and channels, and the oxygen-enriching purification of aquaculture.

three. Features

1. The unique multi-filter chamber structure can realize online backwashing (filtering, draining and backwashing at the same time).
2. According to the water pressure of the system, the tank material can choose to use carbon steel or glass fiber reinforced plastic.
3. The removal effect is good, and the concentration of ammonia nitrogen effluent can be accurately controlled according to customer requirements, avoiding the problems of low efficiency and unstable operation of conventional biological methods.
4. At the same time, the separate regeneration treatment process is operated, which greatly improves the utilization rate of equipment and filter material.
5. Compared with the traditional aerated activated sludge method and ozone activated carbon method, the operating cost is low. When the ammonia nitrogen concentration in the raw water is below 60mg/L, the operating cost is 0.1-0.2 yuan.

Four. technical parameter

1. Treatment effect

①. Ammonia nitrogen content: ≤5mg/L;

②. Ability to remove ammonia and nitrogen: 10g/kg filter material, first-level removal rate: 99%;

③. BOD removal capacity: 3g/kg filter material, first-level removal rate: 60%;

④. COD removal capacity: 3g/kg filter material, first-level removal rate: 60%;

⑤. Dephosphorization capacity: 8g/kg filter material, first-level removal rate: 98%.

2. Water inlet requirements

①. Ammonia nitrogen content: ≤20mg/L;

②. Total hardness: ≤600mg/L;

③. Heavy metal content: up to standard;

④. pH value: >6.5.

3. Working environment parameters

①. Working pressure: ≤0.6MPa;

②. Working temperature: 5-50℃ (special temperature can be customized).

4. Operating parameters

①. Working method: pressure type;

②. Operation mode: bottom-up water flow, series (high ammonia nitrogen content) or parallel;

③. Filtration speed: 5m/h;

④. Filling height of filter material: >1.2mm;

⑤ Operation period: depending on the quality of the raw water, the minimum is not less than 8 hours;

⑥. Backwashing method: water washing, or air-water combined backwashing;

⑦. Backwash time: 10-15min;

⑧. Water consumption for backwashing: 1-3%;

⑨. Backwash intensity: 18-25l/s·m2;

⑩. Regeneration solution: 4-6% salt solution;

⑾. Regeneration time: 12h;

⑿. Regeneration intensity: 8-10L/m2·s;

⒀. Washing time: 8-10min.

five. working principle

1. Process flow

Adsorption and ion exchange → repeated regeneration (backwashing, drug absorption, replacement, forward washing)

2. working process

①. Adsorption and ion exchange

The principle of using active molecular sieve filter media to remove ammonia nitrogen is:

a. Intermolecular dispersion force adsorbs NH⁴⁺ in the solution, reduces the distance between NH4+ and the surface of the filter, and reduces the distance between them.

b. The surface of the filter material is negatively charged, attracting cations to neutralize the negative charge. This negative charge is the electrostatic force of the filter material's physical adsorption of NH4+ cations.

c. The surface of the filter material has a large number of pores and pores, with a large specific surface area and high activity. Under the action of capillary force, NH4+ is quickly carried by the solution into the pores of the filter material. Quickly ion exchange with Na+ in F·F.

②. Repeated regeneration

When the effluent reaches a certain amount, the active molecular sieve will saturate and lose its exchange capacity, and must exit operation for regeneration. At this time, the effluent is provided by other tanks to ensure continuous effluent.

During regeneration, the molecular sieve is required to be backwashed to remove impurities such as suspended solids that may be intercepted, and at the same time to loosen the molecular sieve. Then the liquid medicine is fed from the upper part of the tank, and the regeneration waste liquid is discharged through the drain valve. After the drug washing is finished, the positive washing process is finally carried out to completely remove the residual drug liquid in the molecular sieve layer.

The system can adopt manual and automatic control methods. The working status of each tank is in sequence: running → regeneration (backwashing, inhalation, replacement, forward washing) → running; when the equipment fails, it will automatically exit operation, start the regeneration program, and automatically put it into operation after regeneration. In order to ensure the need for production water, the control system prohibits simultaneous regeneration of the two equipment.

six. Specifications and dimensions

1. Dimensions

2. List of specifications and models

3. Model Description

seven. Selection instructions

1. Equipment selection

①. The buyer must provide detailed water quality test reports, water quality usage, automation requirements, machine room size and other basic parameters, so that the supplier can provide detailed equipment selection and filter materials.

②. If continuous operation is required, the multi-tank parallel cycle regeneration method should be selected, the flow rate should be controlled at 5m/h, the water contact multifunctional ammonia and nitrogen removal filter should be> 15 minutes, the filling height of the filter should be above 1.5m, and it must be operated in countercurrent. .

③. The length of each production cycle (the interval between two regenerations) depends on three factors:

a. The quantity of the equipment loaded to remove the ammonia nitrogen filter;

b. Flow;

c. The content of the processed substance. It is generally economical to design a production cycle of 7-10 days.

④. Calculate the quantity of materials used

According to the processed substance and its concentration, the total daily water consumption and the average water consumption per hour (the equipment works 16-20 hours per day), it is not necessary to consider the filtration rate.

2. device installation

①. The supplier shall provide the relevant operating data of the equipment (such as equipment weight, process flow chart, floor plan, foundation drawing, etc.), and the purchaser shall construct and construct the infrastructure of the equipment by itself based on the relevant operating data provided by the supplier. The concrete floor is poured smoothly, and the error does not exceed 10mm.

②. Calibrate the equipment smoothly, and the error shall not exceed 10mm, so that the equipment can run uniformly and stably.

③. Fill the filter material evenly, and install the filter material according to the design index and filter material specifications.

④. Install the supporting facilities of the equipment body such as pipelines and valves according to the design procedures, and check whether there is any leakage. If yes, perform emergency maintenance; if not, perform debugging.

⑤. Clean the filter element and filter material, open the filtered water and drain valve in turn, clean before operation, and wait until the cleaning water of the filter layer becomes clear. Check whether the equipment is running well.

⑥. Open the water inlet pipe and control the water inlet water volume so that the water inlet water volume meets the design flow rate. Take a clean water sample and open the clean water valve when the ammonia nitrogen content is ≤5mg/L.

3. Equipment

The elution and regeneration of water purification equipment: when the adsorption of the multifunctional ammonia and nitrogen filter material reaches saturation, the regeneration is started. During regeneration, a certain concentration of regenerated liquid (alum or sodium hydroxide, large salt, etc.) is injected into the exchange column through the regeneration system. After circulating for 2-3 hours, soak for a period of time, discard the regenerated liquid, clean for 20 minutes, and the equipment will be restored Original function.