BQF High Efficiency Shallow Air-flotation Water Purifier
Enterprise introduction
Henan Baihui Environmental Protection Technology Co., Ltd. (i.e. Xinxiang Baihui Environmental Protection Technology) is a company devoting itself in professional environmental engineering design, complete equipment manufacturing and engineering construction, which is a well-known, backbone company in national environment engineering industry.The company has a total area of 75000 square meters, an amount of over 50,000,000 RMB of the fixed assets, owning modern factory and complete processing equipment, nearly has 550 staff including 65 technical personnel and 22 senior engineers.
For more than 20 years since its establishment, the company always takes the science technical innovation as the motive force, and taking processing and manufacturing as its foundation, taking the management service as its root .From small to big, weak to strong, thus gradually form its own well-known brand and property right protection system.The company has its own environmental process technology R&D center, new environmental protection equipment development center and complete quality management system and after-service team. Meanwhile, the company cooperated with Canada W&Y Envirnationall NC Company, Sweden Water Link Company and national professional college, environmental science institute, to research, developed and promoted domestic urgent technology and equipment needs, thus made the company hold stronger market competitive power; for well solving the needs of users, our company received high comments from the users. In order to strengthen the quality management, company passed IS09001:2000 quality management system in 2005. Major businesses is divided into two parts:
I. Construct the industry, citizen wastewater treatment plant, including process design, engineering design, equipment processing and manufacturing, engineering installation, commission etc.
II. System design, equipment manufacturing, installation, commission of paper, fiber pulping equipment
The wastewater treatment equipment developed by the company mainly consists of sludge discharging equipment, biological anaerobic device, aerator, sludge dehydrating equipments etc., which all play a leading role in domestic, and completely reaches international advanced standard of the same kind excellent product and obtains various china new patent. About more than 10 plants like Henan Huafeng Paper Wastewater Treatment Plant, Xinxiang Liudian Paper Wastewater Treatment Plant, Liaoning Yingkou Paper Wastewater Treatment Plant, Liaoning Panjin Chuncheng Paper Wastewater Treatment Plant etc. constructed by the company, the wastewater treatment processes of theses plants are advanced and reasonable, the operation cost is low, the running effect stays at domestic advanced level.
Baihui obtains better economic benefits and social benefits at the same time of promoting the technology, the company grows stronger and stronger.
The development strategies of the company:
Putting people first, technological innovation, focusing on our own country, developing the international market.
Science accomplishes ideality, professional achieves future.
BQF High Efficiency Shallow Air-flotation Water Purifier
I. Brief introduction
BQF high efficiency shallow air-flotation water purifier is developed and researched by the company on the basis of digesting and absorbing newest air-flotation home and abroad. This equipment is different from the traditional equipment, which the process is dynamic water come in and static water go out instead of static water come in, and dynamic water go out. Successfully apply the "zero speed" theories; make the body vertically float in the relevant static environment and fast move to the water surface, get the shortest rising distance. So this equipment has the advantages of fast water purification speed, large treatment ability, good effect etc. Thus this equipment is widely used in the treatment of urban wastewater and industry wastewater. Air-flotation integrated system diagram
II. Operating principle
Air-flotation water purified technology is current international relatively new sludge treatment technology.
The air-flotation water purified is under the condition of high-pressure, that dissolves large volume of air in the water as operating fluid dissovled gas water, in the condition of sharply releasing the pressure, uncountable burbles are released, through the surface tension effect, these bubbles sticks the impurities in the water after the dosing reaction.
Purified effect.
High efficiency shallow air-flotation water purified technology is different from traditional air-flotation water purified technology. It adopts new process structure of rotating water distributor and rotating water collector , the inlet water speed of water distributor is the same as the rotation speed of opposite direction mechanism, forming "zero speed", the water in the tank is basically staying in static state. For dynamic water come in, static water go out instead of traditional static water come in, dynamic water go out, successfully apply the "zero speed" theories; make the floating body vertically float in the relevant static environment and fast move to the water surface, get the shortest rising distance, and not affected by the wastewater speed, thus the floating body rises fast, the staying time is shortened to 3~5min from traditional 30~40min, the depth of air-flotation tank can be greatly changed into 0.7m.
In recent years, our company carries out depth research on and analysis of practical running effect of shallow air-flotation equipment (i.e. dissolved gas efficiency of dissolved gas device, water purified efficiency), and reasons of affecting dissolved gas efficiency, improvement of blockage of dissolved gas realizing device and other aspects, design new dissolved gas realizing device which has better digestion, more even, the particle diameter of the releasing micro bubble is greatly reducing. Meanwhile, also improve the structure of dissolved gas device, increase the dissolved gas concentration and efficiency, and greatly enhanced the water purified efficiency of air-floatation equipment.
III. Model designation Micro bubble releasing effect picture
Example: BQF800
B indicate enterprise code
QF indicate high efficient shallow air-floatation water purifier
800 indicate diameter of air-floatation tank (cm)
IV. Scope of application
·Applicable to pretreatment of waterworks
· Applicable to papermaking white water, wastewater treatment and fiber recycling of pulping middle section;
· Applicable to physical chemical treatment of printing and dyeing, chemical industry, light industry, foods, pharmacy, coking, oil production, beneficiation and other industry wastewaters;
· Applicable to the separation of bio-flocculate and water in biological treatment of various wastewaters (instead of secondary sedimentation tank); applicable to wastewater treatments which is for separating solid from liquid.
·In many applications of wastewater treatment, instead of biological treatment, through the 1 level air-floatation physical chemical treatment, basically realize the recycling use and up-to-standard emission.
·Adopt this equipment can reduce sharply the investment expense and operating cost.
V. Applications
1. Papermaking white water treatment and fiber recycling, the recycling rate reaches above 90%, the removing rate of COD reaches above 85%. The treated water can be recyclable used. Removing rate of COD in wastewater of middle section is about 70%.
2. COD removing rate of printing and dyeing wastewater, bleaching and textile wastewater is 60%~70%, BOD removing rate is about 50%, color removing rate of dyes like vulcanization, indanthrene can reach 70%~90%
3. After the various metal ion like Cr6+,Cu2+,Fe3+,Zn2+,Ni2+ is removed from the electroplating wastewater, reach the emission standard.
4. The removing rate of soap wastewater is above 70%, the removing rate of greasing is above 90%.
5. The removing rate of tannery wastewater organic matter is 70%, suspension solid removing rate is 90%.
VI. Equipment features:
·Be designed according to adopt "shallow tank theory" "zero speed theory" and new dissolved gas machine theory;
·Wastewater stays in the tank only taking 3~5min, the efficient of wastewater treatment is high;
· Large treatment ability, surface load reaches 9.6~12m3/m2.h, treatment efficiency is good;
·Floor space is small, air-floatation tank is shallow , efficient water depth is about 0.7m;
·Water level and depth of scum removal is adjustable, the solid content of removed scum is big;
·Dissolved gas device and releasing device are made of stainless carbon, their service life is long and dissolve effect is good;
· Compared with traditional air-floatation, quantity of reagent is small, which can save 10%~20% flocculant, the running cost is low.
VII. Main specifications and technical parameters
Main technical parameters
| Wastewater dwelling time min | Surface load
m3/m2·h | Backflow ration % | Dissolved gas pressure MPa | Driving speed m/min |
| 3~5 | 2~12 | 20~40 | 0.5~0.75 | 3~4 |
Series specification parameters
| Specification/model | Water treatment capacity
M3/h | Diameter of air-floatation(mm) | Available depth (mm) | Total disk height (mm) | Drive power
(KW) | Skimming power
(KW) |
| BQF-500 | 80 | 5000 | 700 | 1100 | 1.1 | 0.75 |
| BQF-600 | 110 | 6000 | 700 | 1100 | 1.1 | 0.75 |
| BQF-700 | 160 | 7000 | 700 | 1125 | 1.5 | 1.1 |
| BQF-800 | 210 | 8000 | 700 | 1150 | 1.5 | 1.1 |
| BQF-900 | 270 | 9000 | 700 | 1150 | 1.5 | 1.1 |
| BQF-1000 | 340 | 10000 | 700 | 1200 | 1.5 | 1.1 |
| BQF-1100 | 420 | 11000 | 700 | 1200 | 2.2 | 1.5 |
| BQF-1200 | 510 | 12000 | 700 | 1200 | 2.2 | 1.5 |
| BQF-1300 | 610 | 13000 | 700 | 1225 | 2.2 | 1.5 |
| BQF-1400 | 720 | 14000 | 700 | 1225 | 3 | 2.2 |
| BQF-1500 | 840 | 15000 | 700 | 1275 | 3 | 2.2 |
| BQF-1600 | 970 | 16000 | 700 | 1300 | 3 | 2.2 |
VIII. Structural diagram
| 01 Rotary bridge frame | 06 Water distributor | 11 Clean water isolation drum |
| 02 Large Air floatation tank | 07 Scum collecting drum | 12 Clean water collector |
| 03 Aisle guard bar | 08 Transmission mechanical and electrical device | 13 Dissolved gas releaser |
| 04 Skimming device | 09 Swivel joint |
|
| 05 Diversion kerb anti-whirling device | 10 Clean water excess flow device |
|
IX. Technological process
Shallow air-floatation process flow block diagram
High efficiency shallow air-floatation system standard process flow diagram
BQF-1200 air-flotation installation and arrangement diagram
