The dosing device, specifically designed for wastewater and sewage treatment, is a critical component of the “accurate dosing and mixing of reagents” in the entire water treatment system. It automatically dispenses specific chemicals into wastewater to achieve physical, chemical or biological treatment goals.
The dosing device, specifically designed for wastewater and sewage treatment, is a critical component of the “accurate dosing and mixing of reagents” in the entire water treatment system. It automatically dispenses specific chemicals into wastewater to achieve physical, chemical or biological treatment goals. The dosing device for wastewater and sewage treatment is a key link in achieving detailed and intelligent control in modern water treatment processes. Not only does it serve as a gatekeeper to ensure treated water consistently meets discharge standards, but it is also a key tool for controlling operating costs, ensuring operational safety and improving overall management.
pH Adjustment (Neutralization): Addition of alkaline reagents (e.g., NaOH, Ca(OH)₂) to acidic wastewater or addition of acidic reagents (e.g., H₂SO₄, HCl) to alkaline wastewater to bring the pH of the wastewater to the neutral range (typically 6-9) to accommodate subsequent biological treatment or meet government discharge regulations. Addition of nutrients (providing nutrition for biological treatment): When the ratio of carbon, nitrogen and phosphorus in wastewater is disturbed, it is necessary to add nutrition sources such as urea, phosphoric acid. Foam suppression/oxidation of specific contaminants: Addition of defoamers or oxidizing agents (eg, sodium hypochlorite, hydrogen peroxide, potassium permanganate). Depending on the goals, various types of wastewater treatment equipment with different functions can be manufactured.
Consistent cleaning effect to meet discharge standards
Precise control is a key advantage. The system automatically adjusts the dosage of reagents depending on changes in the quality and flow of incoming water (based on feedback from online devices such as pH meters, flow meters, turbidity meters), avoiding both insufficient dosing, which leads to non-compliance of purified water with standards, and excessive dosing, which causes excessive consumption of reagents and secondary pollution.
Fast response and adaptability
The system is able to quickly respond to shock loads on the quality of incoming water (for example, a sudden change in pH, a sharp increase in the concentration of pollutants), promptly adjusting the dosing strategy, ensuring stable operation of the treatment system and preventing its failure.
Significant reduction in operating costs
Saving reagents: Precise dosing avoids the huge losses associated with the “extensive” method of adding reagents.
Reduced sludge disposal costs
Excessive dosing (especially of coagulants and phosphorus removers) results in the formation of large amounts of chemical sludge. Precise dosing reduces sludge formation at the source, reducing high disposal costs.
Municipal wastewater treatment: Widely used in all stages: pre-treatment (sand removal), biochemical treatment (nutrient addition), deep treatment (coagulation, flocculation, filtration, disinfection).
Industrial wastewater treatment
◆ Wastewater from electroplating and metalworking industries: pH adjustment, destruction of cyanides, precipitation of heavy metals (hydroxides).
◆ Textile and paper industry wastewater: pH adjustment, coagulation and decolorization, advanced oxidation.
◆ Food and brewing wastewater: Nutrient adjustment, pH neutralization.
◆ Chemical and pharmaceutical industry wastewater: pH adjustment, chemical precipitation, oxidation of difficult to decompose organic compounds.
◆ Water reuse systems: As a pre-treatment or deep treatment unit to ensure water quality when reused.
Review
JY series dosing equipment is designed to meet the needs of the market and customers, as well as to provide production automation in such fields as petroleum, chemical, oil refining, gas production, water supply, thermal power, pharmaceuticals, food processing and others. It uses advanced technology and production processes from the United States, Germany, Japan and other countries, strictly in accordance with the requirements of technological standards and taking into account the actual conditions of China.
JY series dosing equipment is characterized by completeness, advanced technology, high degree of automation, convenient operation, easy maintenance, and the ability to meet the needs of various operating modes. Custom products can also be designed and manufactured to meet specific user requirements.
JY series dosing devices are widely used for dosing reagents in boiler water (ammonia, hydrazine, phosphates), dosing into source water (flocculants, coagulants, acids, alkalis, etc.), dosing into circulating water (corrosion inhibitors, scale inhibitors, fungicides, concentrated sulfuric acid, alkaline solutions, etc.), for chemical additives in oil and gas fields, waste and sewage water treatment, as well as in other operating modes.
The JY series dosing device consists of a solution tank, stirrer, level indicator, dosing pump, filter, damper (buffer), safety valve, various types of fittings, electrical control part, common base with platform and ladder, and pipeline fittings.
Check valve
Complete dispensing devices include the following three categories: simple dispensing device, integrated dispensing device, separate dispensing device.
Simple dosing device
The simple dosing device is equipped with a small dosing pump, stirrer, level sensor and other accessories. All of them are directly installed on the dosing barrel. Thanks to its flexible configuration, small footprint and high efficiency, it is very suitable for use in small dosages. Optional accessories: injection valve, pulsation damper, back pressure valve, control cabinet, etc.
Integrated dosing device
An integrated dosing device means installation in a single unit, that is, the solution tank, agitator, level gauge, dosing pump, control cabinet, ladder platform and other accessories (such as safety valves, dampers, check valves, etc.) are all installed on one channel base.
The metering device combination covers various types, such as "one tank - one pump", "one tank - two pumps", "two tanks - two pumps", "two tanks - three pumps", "two tanks - four pumps", as well as multi-tank configurations with pumps, etc.
Based on the control method, a basic type and an intellectual type are distinguished. The basic type is an open ramp dosing system. The necessary accessories can be selected to ensure more accurate dosing.
Intelligent dosing control system means open-loop control to achieve a fixed proportion. It can also realize closed-loop automatic control based on the set parameter signal and communicate with the superior computer (host computer).
Advantages of an integrated dosing device
1. Aesthetic appearance, varied design, flexible configuration.
2. Stable performance, compact structure, small footprint.
3. Ease of use, high ability to combine.
4. Wide functionality, large selection of accessories, flexible expansion of functions.
5. Ability to design specific dosing system based on user requirements.
Separate dosing device
The separate dosing device is used in some special conditions, such as large dosing volume, specific dosing medium, when it is inconvenient to combine the solution tank and dosing pump in one unit. If the customer has a large solution tank, the dosing pump unit should be installed separately from the solution tank, and then its inlet should be connected by a pipe to the solution tank outlet. Such a device is called a split dosing device. The solution tank may be a large polyethylene container, a stainless steel container, or a cement tank, etc. The pump dosing unit is determined by the number of dosing points, usually it is a single-pump type, a two-pump type (one working, one standby), a three-pump type (two working, one standby), a four-pump type (two working, two standby). The base of the pump dosing unit is made of high-strength channel. The pipeline is secured using brackets and is characterized by its small footprint and rational design.
DN40–DN3000; PN6–PN100, Class150; Material: cast iron, stainless steel 304, rubberized body; Connection type: wafer, flange; Drive: manual, pneumatic, electric.
The fluoroplastic FOB magnetic pump is a chemical process pump that uses the principle of modern magnetic mechanics and transfers force non-contactly using permanent magnets. As the motor rotates, the outer rotor (outer magnetic system) drives magnetic lines of force that pass through the thermowell and cause the inner rotor (inner magnetic system) and impeller to rotate synchronously.
The simple modular dosing unit is a complete plug-and-play dosing device. It is designed, manufactured, assembled and tested at the manufacturing plant in accordance with the customer's technological requirements, and then completely delivered to the site.
Equipment for water-chemical treatment, which is critical in the steam-water cycle of thermal power plants, industrial boilers, etc. Adding microdoses of hydrazine solution to the boiler feedwater reacts chemically with the dissolved oxygen (O₂) in the feedwater to form nitrogen and water.
The three-chamber solution preparation unit is designed specifically for dissolving and preparing solutions of high molecular weight polymer – polyacrylamide (PAM). Mainly used for flocculation treatment of industrial wastewater, flocculation in sludge dewatering, drinking water treatment, and wastewater treatment in chemical, pulp and paper and other industries.
CAD technology is used to redesign the design multiple times to ensure that the submersible pump body and impeller are perfectly matched, allowing fibers and debris to pass through easily without becoming tangled or clogged.
The outlet diameter and the inlet diameter are the same. SKF bearings, a world famous brand, ensure more stable operation.
The FSC (single stage, single stroke) PTFE alloy centrifugal chemical pump - hereinafter referred to as "FSC centrifugal pump" - is designed and manufactured in accordance with international standards and based on non-metallic pump technology.
Although reagent dosing plants in the petroleum and petrochemical industries do not directly produce products, they are an indispensable “guardian” and “lubricant” in the entire production chain.
Diameter: DN15–DN1200; Pressure: PN16–PN160, Class150–Class2500; Housing material: WCB, stainless steel 304/316, duplex steel; Connection: flange, threaded, welded, clamp; Drive: manual, pneumatic, electric, hydraulic.
Thanks to the reciprocating movement of the plunger, the working medium is directly sucked in or pumped out. Since the plunger and seal are in direct contact with the fluid, the correct choice of plunger material and seal type will ensure more ideal pump performance during operation.
The centrifugal chemical pump made of fluoroplastic type FSC (hereinafter referred to as the pump) developed by our company is a single-stage, single-pass cantilever centrifugal pump. It is manufactured using superior hydraulic design and advanced, proven processing technology.
Can pump clean water and slightly contaminated water with temperatures up to 40°C and pH 4–10; the maximum diameter of passing particles is 100 mm.
Self-priming magnetic pumps of the ZFT series fully combine the advantages of a magnetic pump and a self-priming pump: they have a self-priming function, but at the same time they do not have a shaft seal, they use transmission through a magnetic coupling, which completely eliminates the phenomenon of drip leaks.
Thanks to the reciprocating movement of the plunger, the working medium is directly sucked in or pumped out. Since the plunger and seal are in direct contact with the fluid, the correct choice of plunger material and seal type will ensure more ideal pump performance during operation.
The length can be individually adjusted from 450 to 1000 mm depending on the depth of the customer's tank.
