Brief introduction of hyperboloid mixer

I. Preface:

Mixing water is one of the key processes in municipal, chemical and papermaking water treatment. Traditional mixing machines are divided into vertical shaft blade folding type and horizontal type (submersible type). Because the installation mode and blade form determine its mixing form, both energy consumption and mixing effect are not ideal, which not only brings unnecessary increase to the operating cost of sewage plant, but also directly affects the process treatment effect. In view of the above problems, after years of experiments and drawing on the design experience of peers, a brand-new curved mixer was successfully developed. After many years of practical application in several sewage treatment plants, good results have been achieved, which fills the gap of this kind of products in China and becomes the first choice to replace imports.

Second, the application scope of multi-curve mixer:

Multi-curve mixer (vertical mixer) is suitable for mixing liquid with liquid, liquid with solid, liquid with gas in environmental protection, chemical industry, energy industry and other industries, especially for sewage treatment and water purification projects, as follows:

1. Stirring in the regulating tank: The regulating tank is used to regulate the peak water volume and peak load in sewage treatment projects, with the aim of achieving uniform stirring, and is usually used in industrial projects, such as breweries, printing and dyeing plants, paper mills, etc.

2. Mixing and coagulation and stirring: used for dissolving and stirring chemicals in water treatment and coagulation and stirring chemicals and water; That is, if the treatment process requires additional chemical treatment, such as adding lime or other sewage treatment chemicals.

3. Disinfection and stirring: used for contact and stirring of liquid chlorine and other disinfectants with water in water treatment; The function is to improve the mixing degree of liquid chlorine and sewage.

4. Sludge stirring: used for sludge anaerobic digestion stirring and sludge homogenization tank stirring. Typical applications are sludge concentration tank, sludge anaerobic digestion tank and sludge storage tank.

5. Anaerobic stirring: The stirring in anaerobic treatment of sewage is carried out in an anaerobic tank, and good uniform stirring is needed to ensure good process effect.

6. Nitrogen removal stirring: stirring during nitrogen removal during sewage nitrogen removal treatment; When it is used in denitrification tank, it is an indispensable part of biological treatment process to achieve ideal denitrification effect.

7. Agitation in A2/O tank: It is used to agitate sewage, anaerobic dephosphorization and anoxic denitrification in A2/O process.

8. Sludge heat treatment needs to fully and gently stir the sludge to obtain suitable digested sludge.

9.SBR tank stirring: it is used for denitrification stirring in the denitrification process of SBR tank treatment process, that is, the alternating biological reaction tank, which is alternately circulated by nitrification process and denitrification process.

Third, the structure introduction:

QDJ and GDJ series multi-faceted mixers are composed of driving device, hyperboloid impeller and installation accessories. In order to meet the needs of users under different working conditions, the installation is divided into dry (also known as vertical shaft) and submerged type. Dry installation: the driving device is fixed on the working bridge, and the kinetic energy is transferred to the impeller parts in the medium through the transmission shaft. Used in liquid with high solid content, high water temperature and abrasiveness. Because the impeller has the function of automatic deviation correction, it runs smoothly and the noise of the reducer is less than 60 decibels. For submersible installation, the bridge can be omitted, and the submersible power is adopted, and the self-weight of equipment is used for positioning. The installation is flexible and convenient, and it is suitable for water with deep water depth, stable water quality, no abrasion, water temperature not exceeding 40℃ and PH value between 6 and 9. It is characterized by no noise and no visual impairment.

QDJ and GDJ series multi-faceted mixers are composed of driving device, hyperboloid impeller and installation accessories. In order to meet the needs of users under different working conditions, the installation is divided into dry (also known as vertical shaft) and submerged type. Dry installation: the driving device is fixed on the working bridge, and the kinetic energy is transferred to the impeller parts in the medium through the transmission shaft. Used in liquid with high solid content, high water temperature and abrasiveness. Because the impeller has the function of automatic deviation correction, it runs smoothly and the noise of the reducer is less than 60 decibels. For submersible installation, the bridge can be omitted, and the submersible power is adopted, and the self-weight of equipment is used for positioning. The installation is flexible and convenient, and it is suitable for water with deep water depth, stable water quality, no abrasion, water temperature not exceeding 40℃ and PH value between 6 and 9. It is characterized by no noise and no visual impairment.

Fourth, the working principle:

The upper surface of the curved impeller body of QDJ and GDJ series curved mixers is a hyperboloid structure formed by the rotation of hyperbolic generatrix around the axis of the impeller body. Its unique impeller structure design combines fluid characteristics with mechanical movement to the greatest extent. The equation of hyperbola is the surface formed by the rotation of xy=b curve along y axis; In order to meet the flow of water, the water is designed from the center of the impeller, which on the one hand reduces the turbulence of the inlet water, on the other hand ensures the uniform pressure of the liquid on the impeller surface, thus ensuring the balance of the whole machine in motion. Eight guide vanes are evenly distributed on the divergent hyperboloid, and the self-weight pressure of liquid is used as a supplement, and the potential energy obtained by centrifugal force generated when the impeller rotates forms kinetic energy. Under the action of gravity acceleration, the liquid moves tangentially along the circumferential direction of the impeller through the transition of the hyperboloid structure, and under the reflection of the pool wall, a top-down circulating water flow is formed, so as to obtain an axial (Y) and radial (X) intersecting water flow (such as hyperboloid flow pattern).

It is precisely because of the structural characteristics of the impeller of G/QSJ series curve mixer and its installation near the bottom of the pool that its working position has a direct anti-settling effect on suspended solids, and it can obtain ideal mixing effect and effectively eliminate the dead angle of mixing. Large specific surface area can obtain large-area water exchange.

Verb (abbreviation of verb) performance and technical requirements:

1) summary

Multi-curve mixer is used to dissolve various treatment chemicals or make raw water and coagulant react quickly to meet the process requirements. Multi-curved mixer is composed of transmission device and impeller, which can be divided into dry type (also called vertical shaft installation) and wet type (namely submersible installation) according to different installation methods.

2) Structure description

Hyperbolic vertical shaft mixer consists of five parts: reduction motor, shock absorber, mixing shaft, impeller and electric control.

(1) deceleration motor

The motor is an integrated structure composed of AC squirrel-cage induction motor and parallel shaft-helical gear reducer (hard tooth surface). The service life of all bearings of hyperboloid mixer is not less than 65438+ million hours.

The motor is outdoor, with protection grade IP68 and insulation grade F. The gear box of hyperboloid mixer is equipped with oil level inspection hole, which runs 24 hours.

(2) Damping seat

The reduction motor is fixed on the bottom plate with damping device to reduce the vibration generated by equipment and structures.

(3) Mixing shaft

The stirring shaft is connected with the reducer and the impeller to transmit power. In order to effectively prevent corrosion, high-strength corrosion-resistant materials are selected to meet the rigidity and corrosion resistance, and the two ends of the shaft are connected by flanges. Straighten before leaving the factory to ensure verticality.

(4) Impeller

The mixer quota is based on continuous working system (S1); The agitator rotates smoothly and freely without abnormality; The reducer adopts domestic famous brands, and the installation form is vertical; The rotation direction of the output shaft of the reducer can be driven in both positive and negative directions, so it is not easy to choose turbine transmission; When the mixer is segmented, it is connected by rigid coupling; If the mixer is installed outdoors, there must be waterproof and moisture-proof measures; The electric cabinet is equipped with overcurrent protection and alarm device, and the outdoor protection level is IP65.

(5) Motor requirements

The motor and electric control equipment shall be well grounded, and the grounding resistance shall not be greater than 4Ω; The noise of the mixer shall not exceed 85dB (a); The mixer should be overhauled once a year. Under the specified conditions, the first trouble-free operation time is not less than 8000 hours, and the service life of the whole machine is not less than 15 years.

(6) Electronic control

The power supply is an incoming line. The supporting electric control cabinet has complete protection functions. In addition to motor overload, phase loss, undervoltage, short circuit and open circuit protection, it also provides motor temperature rise alarm protection. The control cabinet is equipped with a working mode selection switch, which can select local control and remote control. Set up PLC interface, accept input and output signals and remote control instructions, and have various fault protection and alarm output functions. The field cabinet is made of stainless steel, with protection grade of IP65 and insulation grade of F. ..

3) Main component materials

Frame: high quality cast iron HT200

Coupling: high quality cast iron HT200 or steel.

Mixing shaft: 304 stainless steel

Blade: FRP

Underwater support: 304 stainless steel

Fastener: stainless steel 304

Six, the characteristics of multi-curve mixer:

Hyperbolic mixer (vertical mixer) has changed the disadvantages of conventional mixer, such as uneven flow velocity, mixing dead angle, low volume utilization rate, etc., and produced uniform bottom omni-directional push flow in the pool, with no dead angle, no precipitation, calm water surface and no air entering the water. The impeller of the mixer has perfect shape, hyperboloid design and bladeless structure, which will not cause any sundries hanging on the mixer or fiber winding, and does not need any maintenance during normal operation.

Hyperbolic mixer (vertical mixer) has low impeller speed, little wear and good corrosion resistance, so it has reliable performance and long service life. Compared with the conventional mixer, the large-capacity omni-directional plug-flow hyperboloid mixer has lower energy consumption, and generally only needs 2~3 watts to mix 1 m3 sewage, saving energy by 30%~50%.

Hyperbolic mixer (vertical mixer) is different from other mixing equipment in that:

1. Because the fluid conditions tend to be ideal, the energy consumption is low.

2. Because of the high water velocity in the whole pool, there will be no sludge precipitation.

3. When the agitator is running, it can self-correct to ensure that the downward force is vertical, thus preventing unbalanced movement.

4. Push the flow in all directions, so that all areas in the pool can be stirred evenly, and there will be no dead ends.

5. There are no consumable parts under the water, so you can easily and conveniently contact the deceleration motor for maintenance.

6. Do not use corrosive materials, and use advanced anti-corrosion materials for the mixing tray and shaft.

7. The whole is exquisite and perfect. Continuous improvement ensures extremely long service life and lasting quality.

8, will not be blocked. Unlike the horizontal plug-flow agitator, nothing hangs on the agitator body.

Impeller material: FRP, stainless steel. The above parameters are applicable to conventional municipal water supply conditions.

Eight, application selection

The choice of QDJ and GDJ is exactly the same, but the installation method is different. Like other types of mixers, the choice of multi-faceted mixer is related to the parameters such as pool shape, volume, liquid depth, medium concentration, temperature and PH value.

The selection of multi-curve mixer is mainly based on the effective service area of each multi-curve mixer and the principle that the ratio of pool length to pool width is not more than twice, and the rectangular pool is divided into several equal working units to determine the number of mixers.

In addition, if the water depth exceeds 8 meters or the liquid concentration exceeds the specified value, the power should be increased or the working speed of the multi-faceted mixer should be increased when selecting to ensure the mixing effect in large-capacity and high-concentration liquid. QSJ series multi-faceted mixer can be selected under normal working conditions, and GSJ series multi-faceted mixer can be selected under high temperature, high corrosion and harsh corrosive environment. Under special circumstances, our company can assist users in type selection.

Installation steps of GDJ series multi-curve mixer

1, the bridge should be horizontally corrected, the half-bridge column should be vertically corrected, and the anchor bolts and connectors should be firm and reliable.

2. Place the shock absorber flat on the designated position of the bridge, and fix it with the bridge after leveling.

3. The reduction motor is installed on the damping seat and connected and fixed.

4. Connect the impeller and the flange of the mixing shaft with bolts and tighten them.

5. Put the impeller and the mixing shaft into the pool, and connect the mixing shaft with the output shaft of the reducer. When there is water, first connect the shaft with the impeller and put it into the water, then connect the shaft with the reducer.

6. After the installation of the multi-faceted mixer, the mixing shaft must be vertical to the horizontal plane, and the vertical deviation is less than 1 and 1000.

7. After the installation, remove the motor tail cover, move the blades by hand, and check whether the multi-curve mixer is flexible and normal. The swing deviation of the mixing shaft should be less than 3/ 1000.

8. After turning on the power supply, observe the conveying direction of the mixing shaft by inching, and the correct conveying direction is counterclockwise from top to bottom. Otherwise, arbitrarily change the wiring positions of the two power supplies.

9, electrical equipment installation must comply with the relevant provisions of the state and safety regulations.

Installation steps of QDJ multi-curve mixer series

1. Start the machine on shore for a short time and observe the running direction of the impeller. The correct running direction is counterclockwise from top to bottom. Otherwise, switch the wiring positions of the two power supplies at will.

2. Separate and fix the motor cable from the sling. Do not connect the cable wire rope together, and prevent the wire rope and cable from being involved in the impeller.

3. Lift the multi-curved surface with a crane and slowly put it into the specified position in the pool, taking care not to hit the pool wall.

4. Fix one end of the fixing rope on the shore, and electrically control the cabinet cable.

X. product operation of multi-surface mixer:

After the equipment is installed, it must be put into trial operation. Before trial operation, water about 70% of the tank volume must be injected into the tank. Never run the equipment without water, so as not to bend the mixing shaft due to uneven force. Pay attention to the inspection after commissioning:

1, whether there is abnormal noise and temperature rise of the deceleration motor.

2. Whether the motor current is within the rated value (overcurrent is normal when starting)

3. The stirring shaft swings

4. Is there any sundries in the swimming pool?

XI。 Maintenance of multi-surface mixer;

1. The new machine starts to run for 200~300 hours, so it is necessary to replace the reducer lubricating oil and clean up the internal oil pollution. It can be replaced once every six months to one year; Please refer to the manufacturer's maintenance instructions for the use of the deceleration motor.

2. Regularly check whether the lock nut and connecting bolt of the mixing shaft are loose.

3, regularly check the stirring shaft swing, clear the entanglements of impeller and shaft in time.

4, regularly check the transmission parts for abnormal sound and temperature rise.

5, regularly check whether there is any abnormal change in current.

6. After the equipment does not work for a long time, check the insulation of the motor before starting it again, and at the same time prevent the motor and impeller from being damaged due to the difficulty in starting due to long-term sediment deposition.

7. The above inspection should be recorded. If there is any abnormality, please contact our company.