Working description:
With the presence of a surface catalyst, high effective the catalytic oxidation tower uses of strong oxidizing agents - chlorine dioxide, under atmospheric pressure at room temperature catalytic, shall carries out the oxidation of organic pollutants in wastewater, or direct oxidation of organic pollutants, or contaminants oxidation of organic molecules into small molecules of organic pollution objects, to improve biodegradability of the wastewater for a better way to remove organic pollutants. During the degradation of COD in the process , organic molecules in the double bonds of chromophores such as azo, nitro, sulfide, hydroxyl, imino carbon and so on inside organic molecules shall be interrupted in order to achieve the purpose of decolorization, while make wastewater easy to biodegrade once effectively improve the BOD / COD value. In this way, chlorine dioxide catalytic oxidation reaction by chlorine- dioxide take a role as bridge between the conventional physical pre-treatment and bio-chemical treatment for wastewater with a high concentration, high toxicity, high-salinity. Efficient surface catalyst (a variety of rare class) with activated carbon as a carrier, shall go through multiple impregnation and heat treatment.
Because it adopts steam heating, liquid film type flowing evaporation for feed liquid, whole heating system has high thermal transmission and other major feature of short heating time. If it is equipped with heating pressure pump, the system will save more energy, lower consumption of steam and circulation of cooling water.
- It is suitable for liquid evaporation and concentration of larger viscosity as a result of material flows down and evaporates along inner wall of canal.
- Material heating time is very short as material film inside every canal. That is good for wastewater evaporation and concentration.
- Equipment is suitable for the evaporation and concentration of foaming material, due to liquid in the heating tube carried out the membrane evaporation, namely vapor-liquid separation, while majority of liquid at the bottom of the body is pumped to outside, only a bit of liquid enters into separator gather with secondary vapor, thus liquid process does not generate great impact to avoid the formation of bubbles.
- Cleaning system is option. it enables to clean in-site. Operation is convenient.
- Material can be fed and discharged continuously.
- Equipment can be equipped with automatic systems to achieve the automatic control for feeding, heating temperature, feeding concentration, cleaning. Security measure is provided for sensitive materials against the accident of suddenly power cut and equipment failure. Other automatic controllers for safety and alarm are provided for customers option.
Solution preparation :
TJAT chemical dosing equipment is designed for continuous chemical preparation and dosing under a totally automatic operation from dry powder to requested liquid solution. Process of preparation: powder enters into mixer through hopper after dissolved into liquid flows to dissolution tank where liquid be diluted to solution with density as request. This solution enters into storage flowing through curing tank. This preparation process will re-begin working once the level is lower than lower limit and sensor sends signal of on. Controller monitors water quantity and adjusts powder dosage as per requested solution concentration at the same time so that insure the constant concentration even though water flow are changing.
Application:
a) Wastewater treatment:
Sludge dewatering process
Grade three and four treatment for municipal wastewater
Flocculation for municipal sewage and industrial wastewater
b) Drinking water purification
Heighten the effect of purifying and settling when treat surface water for portable water
c) Other fields:
Reduce cost and load when it is used for industrial wastewater treatment in fields of chemical industry, galvanization, food, drink, electric energy.
Wastewater treatment of Paper making industry
Wastewater treatment for Ore smelting works
Salt water disposal.
* Working principle
Basic configuration of anaerobic reactor is similar to series connection of two layers of UASB reactor. High-rate reactor is composed by five areas with different function, as mixing area, No.1 anaerobic reaction area, No.2 anaerobic reaction area, settling area and gas-liquid separating zone.
Mixing area: Influent, partial sludge and returning mixture coming from gas-liquid separating zone will be mixed in this area.
* No.1. Anaerobic area: The mixture coming from mixing area enters this area where most of organic matter transfers to gas. Sludge inside this area expands and be fluidized under strong agitation of up-flow of mixing liquid and gas, so that increase the surface contact of sludge and liquid and improve sludge activity. A few of sludge- liquid mixture will be raised to gas-liquid separating zone by increasing gas.
* Gas-liquid separating zone: Gas is discharged out of system after separation from mixture in this zone. The separator of liquid will return to bottom mixing area through recirculation tube and repeat above process.
* No.2 Anaerobic area: Effluent from No. anaerobic area enters No.2 Anaerobic area through three-phase separator. Being a lower sludge concentration area and the majority of organisms in wastewater in an anaerobic zone has been degraded, thus the amount of methane produced less. Gas through the gas pipe enters into gas-liquid separating zone and creases less of agitation in No. 2 anaerobic area, which provided favorable conditions for the sludge remained.
* Settling area: Mixture of No.2 Anaerobic area is carried out solid-liquid separation in the settling areas, the supernatant is drained away by outlet pipe, sedimentation of granular sludge returns to sludge bed of No.2 Anaerobic area.
* From working principle of anaerobic reactor can be seen that High-rate reactor achieves the SRT> HRT through the two-layer three-phase separator and obtain a high sludge concentration; to full access to the mud and get a good Mass Effect through a large number of gas and severe disturbance of the inner loop.
* Technical feature of process:
- High volume load: organic load of influent of High-rate reactor is 3 times that of other general UASB reactor as it has high sludge concentration, large number of microorganisms and inner loop.
- Low investment and small land requested: High-rate reaction size is about 1/4-1/3 of the size of general UASB reactor that much reduce the investment of foundation for reactor. Furthermore, ratio of height and diameter is large (usual about 4-8), thus it saves much land. High-rate reactor is suitable for industrial and mining enterprises.
- Strong ability against impact load: Flow quantity of inner loop could be 2-3 times of input water quantity when the wastewater concentration is low about COD=2000¡«3000mg/L; Flow quantity of inner loop could be 10-20 times of input water quantity when the wastewater concentration is high about COD=10000¡«15000mg/L.
- Strong ability against low temperature: High-rate reactor contains a large number of microorganisms that reduces the impact of temperature for anaerobic digestion. Usual, High-rate reactor can carried out the anaerobic digestion under room temperature about 20-25¡æ, thus resolve difficulty of thermal insulation and save energy.
- Balance pH: Flow quantity of inner loop equals to recirculation flow quantity. It takes the use of Alkali transferred from COD to balance pH. Thus reduce the alkali dosage for input water.
- Internal auto-cycle, without external power: the return of normal anaerobic reactor is achieved through external pressure, while the high-rate anaerobic reactor to produce biogas as to enhance their own power to achieve the mixture inside the circle, thus it does not need the pump to enforce the circulation, saves power consumption.
- Output stability is good. It takes use of class 2 anaerobic treatment of series connection of UASB that reduce the bad interference of high concentration of Ks produced anaerobic process.
- Start-up period is short: high-rate anaerobic reactor contains sludge with high activity, makes biological proliferation fast that quicken the reactor startup speed. Startup period of High-rate anaerobic reactor is generally 1 to 2 months; while the period of ordinary UASB startup is 4 to 6 months.
Working principle:
Air flotation is a liquid-solid separating process in wastewater treatment. When particle formed in water as suspended solid, namely raw water contains fabric, sand, sludge and other solid or dissolving type water or becomes like gels after chemincal and physical treatment had transfer to suspended solid, is adhered and wraped by sufficient fine air bubble, specific gravity of particle is smaller than that of water that access to liquid-solid separation.
Application:
- For paper mill, be used to reclain the white water from paper machine, fibre from medium stage wastewater and lignin from black liquid.
- Liquid- solid separation for emulsified liquid and oil wastewater from machenical or petroleum industry
- Painting desposal and Printin and dying wastewater treatment from Auto industry or other fields.
- Pre-treatment for slaughter and food industry
- Liquid-solid separation for agent dosage of non-degradation by biological roganic
- Liquid-solid separation of chemical process for electroplating wastewater or sewage containing heavy metal ion
- Water treatment for urban running water or protable water.
- Liquid-solid separation and sludge thicken for excess sludge during the wastewater treatment process
Manufacture feature :
(I) Floating upward tank uses reinforced concrete structure; its main equipments are as following:
1. Dissolved gases system:
1) Centrifugal pump unit: pressure pump of dissolved gases water, water circulating pump, the pressure value is about 0.3 MPa¡«0.35 MPa;
2) Dissolved gases tub: working pressure of the tub is 0.30-0.33 MPa (material:Q235A) (accompanied by pressure gauge and USERPage - 3 -4/20/2012water leveler);
3) High efficient gas jet unit: working jet equipment and circulating air adding jet equipment unit installed in the tub (material quality is 1Crl8Ni9Ti);
4) Vacuum air intake valve;
2. Water relief and collecting system:
1) Relief and mixing device of raw water and dissolved gases;
2) Water level adjusting device of floating upward tank in water collecting plant;
3. Stirring machine: (used for slag floating and air releasing) equipped with stirring device, electric motor and speed reducer.
4. Slag eliminator: equipment used to eliminate floating particles.
5. Electric control system: Power Distribution Cabinet (control working pump, circulation pump, stock pump, stirring machine, and slag eliminator).
(II) For the engineering that water quantity used is relative small adopts steel integrated structure, it can be applied after that all equipments are installed, corollary equipment are complete, and the electric power source is linked.
