blower or compressor low pressure widely used in chemical, metallurgical, food and mining industries as well as in aeration Wastewater, production building materials and on the railroad.
Spetsstroymashina produces blowers of the BP series (rotary blowers), based on superchargers from the world's best manufacturers, such as Tuthill
Vacuum & Blower Systems (USA); Dresser Roots (USA, England), Aerzener Maschinenfabrik GmbH (Germany). All blowers used are ISO 9001 certified. BP series blowers manufactured by Spetsstroymashina have high efficiency, reliable and trouble-free in operation over a long period of operation.
When working with the Customer, the engineers of our company carefully and scrupulously study and analyze the received technical information and offer high quality equipment at the best price.
The use of high-quality imported blowers with low noise characteristics make it possible to use blowers of the BP series directly in industrial premises. For additional protection from the effects of noise radiation, the Spetsstroymashina company manufactures and supplies, complete with blowers of the BP series, noise-protective casings for two modifying ShK SSM and ShK Stribog SSM with an integrated blower control cabinet SHUV SSM.
The noise casing SHK SSM is designed in such a way that the opening of the minimum number of panels allows for the best service for the components and mechanisms of the blower.
The design of BP blowers allows for easy and unhindered access to the main components that are subject to periodic replacement or maintenance: belts, blower filler plugs, electric motor junction box, removable cover air filter etc.
BP series blowers are equipped with vibration dampers. There is a possibility of simple and quick installation vibration mount on concrete foundation production premises.
To automate the operation of equipment, Spetsstroymashina produces various cabinets blower control SHUV ZT SSM (star-delta), SHUV PlP SSM (blower control cabinet with soft start), SHUV ChP SSM (blower control cabinet with frequency drive), etc., using for this purpose the components of such well-known world manufacturers as Siemens, Danfos, Mitsubishi, etc.
Through the efforts of the designers of the Spetsstroymashina company, it was possible to design blowers of the BP series, harmoniously combining quality, compactness and the ability to install drive motors from different manufacturers on one base.
Weight and dimensions characteristics of blowers of the BP series are commensurate with foreign analogues. Installing BP series blowers saves a lot of floor space and increases convenience. Maintenance equipment.
If the Customer does not have premises for equipment installation, the Spetsstroymashina company manufactures and installs blowers into the block containers of the Sever type with various degrees of automation, as well as performs service and commissioning.
Blowers manufactured by Spetsstroymashina undergo strict quality control and mandatory certification, which allows our products to compete with many global manufacturers of low pressure compressors, such as GE Roots, Vienybe, LUTOS, Robuschi, Kaeser Compressors, Hibon, Atlas Copco, Aerzener.
Wastewater treatment plants use blowers for two processes:
1. Aeration - forced saturation of wastewater with air to stimulate the reproduction of aerobic bacteria. These beneficial bacteria decompose the biomass contained in the water into methane and carbon dioxide. This process occurs at all major facilities in Russia. Depending on the volume of incoming effluents, the intensity of aeration is changed by adjusting the performance of the blowers.
2. Removal of biogas resulting from the decomposition of organic substances contained in wastewater by bacteria. Biogas, consisting of methane and carbon dioxide, is pumped out by a blower from tanks and delivered to the consumer. Unfortunately, in Russia the work of blowers for pumping out biogas is not yet very common. However, experience in the utilization of biogas is gradually being introduced in the vastness of our country.
3 most popular blower models for wastewater treatment plants
Introducing 3 blower models best suited for basic applications treatment facilities.
This model has an engine power of 4 kW and provides a pressure of 400 mbar (0.4 atmospheres) with a capacity of 200 m3/hour. Among vortex blowers small size This model is very successful in terms of power and performance ratio. This model has the best price solution in the class.
The power of this unit is 11 kW, it provides a pressure of 600 mbar (0.6 atmospheres) with a capacity of 270 m3 / h. This model is powerful enough for a vortex blower. In our opinion, 11 kW is the maximum power of a vortex blower, which is advisable to use in wastewater treatment plants. The fact is that more powerful models of vortex fans are already compared in price with blowers of other types, and although they outperform them in terms of ease of use and durability, they are much inferior to them in terms of energy efficiency.
It is no secret that blowers for sewage treatment plants should not have oil impurities in the exhaust. Model SDT 22 has a power of 30 kW, a pressure of 1000 mbar (1 atmosphere) with a capacity of 1100 m3/h. This is very powerful unit has a very high efficiency, but a shorter service life compared to the previous two models, and also requires more expensive and qualified maintenance. Thanks to the Lutos screw block, this blower has an absolutely clean exhaust without oil impurities.
If none of the above 3 models fit
No matter how popular these models are, in many cases an individual selection of the blower according to the parameters is required. Pick up desired model, knowing the required air flow and pressure, you can on the main page of our resource.
For selection and select the type of equipment "blower", then enter the desired parameters. A reference base of more than 400 blowers is at your service various types and manufacturers.
In Russia, wastewater treatment plants are one of the main consumers of electricity, most of which is used to power turbo blowers. Typically, multi-stage turbocompressors are used to supply air for the treatment of domestic, storm and industrial wastewater. But practice shows that it is more profitable to install easily controlled industrial blowers that save up to 50% of electricity, and their purchase pays off in 3 years.
These savings come from variable turbochargers delivering just the right amount of air for the engine. biological treatment drains depending on seasonal temperature fluctuations. At the same time, the efficiency of such equipment is more than 80%. Note that the maintenance and repair of turbo blowers takes no more than 1% per year from total cost aggregates.
A distinctive feature of industrial blowers is the presence of adjustable guide vanes on suction and discharge. The air adjustment range is maximum (from 45 to 100%), while the efficiency decreases by only 3-4%. There is blower equipment with rotary-blade mechanisms that allow you to adjust the amount of air masses supplied to the aerotanks, so you can adjust the degree of aeration.
Controlled industrial blowers have the following technical characteristics:
- productivity - from 1000 to 120000 m3 / h;
- adjustment range - from 45 to 100%;
- power - from 34 to 3300 kW;
- Efficiency - from 88 to 92%.
Types of blowers
Exist different kinds industrial blowers that are installed at large treatment plants and industrial enterprises. Let's consider each type separately.
Rotary blowers
These blowers use an oil-free method of compressing and supplying air. The principle of operation of such equipment is as follows: two three-toothed (three-lane) rotors, which are located parallel to the motor, rotate in the housing in different sides acting as a piston. Thus, the non-contact running of the rotors does not require lubrication.
Rotary blowers
This equipment belongs to vertical air flow units. The blowers include a discharge element with three-toothed rotors with a belt drive, noise and suction silencers, safety valves, compensator check flaps, two pressure gauges or a clogged filter indicator. The oscillating frame of the motor automatically tightens the belts, which ensures efficient operation of the drive without special service personnel.
Centrifugal
According to the principle of operation, this equipment belongs to dynamic radial compressors. The pressure and compression of the air is created by the operation of the impeller stages, accelerating the medium and then slowing it down with high-efficiency diffusers with a large radius, while a certain pressure drop is created at the exit.
Compressor low pressure or blower - equipment designed to supply pressurized air to a biological water treatment system. Wastewater treatment plant with the help of oxygen injected blower stations, accelerate the decomposition of organic matter by aerobic bacteria. Aeration air contributes to the decomposition of biological contaminants activated sludge. Aerotank Serves as a biological water treatment reactor.
Compressed air supply to biological treatment
Aerobic bacteria in the form of activated sludge are used in the biological treatment stage. The process of decomposition of organic compounds is based on redox reactions. Under the influence of activated sludge, organic matter decomposes into methane and carbon dioxide. At the same time, bacteria multiply. The more oxygen in the water, the faster biomaterials are absorbed.
Air is supplied to the preaerator, where it bubbles with activated sludge and enters the aerotank. Part of the sludge from the secondary settling tanks in the regenerator, after being treated with air, restores activity and enters the aerator. main stream compressed air is sent to the aerotank or biofilters with aeration, depending on the chosen scheme. So, the blower works at the biological stage, activating aerobic bacteria. Only in the conditions of an aquatic environment with an excess of oxygen does biological purification occur by 98%.
The efficiency of the aerotank depends on correct selection blowers by type and performance.
Blower Equipment Classification
Blower stations must ensure the supply of oxygen for biological water treatment. Blower requirements:
- the forced air must not contain impurities;
- low power consumption and easy maintenance;
- mechanisms must work silently;
- match line performance;
- have adjustable feed air, improving energy efficiency.
Based on the criteria, the calculation and selection of units is carried out. There are two types of installations - submersible and centrifugal.
Submersible compressors are installed in the body of the aeration tank at depth, with piping for monitoring and controlling suction filters. In the water column, intense heat is removed from the housing, the bearing assembly does not heat up. The compressor works more reliably, the overhaul period increases several times.
Centrifugal systems have a large capacity and several stages of compression. They use forced lubrication and water cooling.
According to the principle of operation of the installation are:
- piston;
- screw;
- vortex.
Piston installations compress the gas in the chamber, creating pressure. Screw or rotary models are compact, feed into the system fresh air without traces of oil, work not noisily and around the clock. Rotary models have bearings outside the compression zone, the rotor is mounted on a shaft.
In terms of air compression, devices are low-pressure, but with greater productivity, or designed for high parameters compression at a lower cost. Gradation is necessary when choosing equipment for aerotanks of different depths.
The main energy consumption of treatment equipment is associated with air supply to aerotanks. Reducing the energy component is possible if you use installations with adjustable flow and compression.
Compressor manufacturers advantages and disadvantages of equipment
Controlled industrial blowers have proven their efficiency with a quick payback. Siemens is the main equipment supplier. In Russia, up to 80% of unregulated installations are energy-intensive. Payback of new controlled installations in 2-4 years with annual savings of up to 35% of electricity. The company gives them on leasing terms. Adjustable blowers offers Russian company"Ekanit" at lower prices.
Longtime developer and manufacturer of compressors, Lithuanian company Vienybe offers big choice rotary, vortex compressors. The choice of models is extensive, and meets modern needs.
For post-treatment drinking water in a water treatment system, air supply will speed up the air bubbling process. The equipment is supplied by EcoTechAvangard. Blowers with a pressure of 1 bar are called low-pressure blowers, and are produced as equipment for WTP.
Foreign representatives offer compressor equipment:
- EPU Systems specializes in EVW submersible models;
- Italian compressors of the Robuschi brand are characterized by great performance and quality of working surfaces;
- Japanese Hiblow models are compact, economical and reliable, new technologies are used;
- Becker German equipment creates compact, reliable models that meet modern requirements.
Blower selection during the reconstruction of treatment facilities
The task of the reconstruction of production is to replace the used units with modern, cost-effective ones. The blower must meet the requirements of:
- increasing the productivity of the aerotank without increasing the volume;
- embed the control of an adjustable blower into an automated process;
- reduce energy consumption for air supply.
Equipment is selected taking into account new developments of manufacturers.
- use of fine bubble bubbling;
- replacement of blowers with submersible automated systems;
- installation of low pressure compressors.
In the process of modernization, a scheme can be applied phased replacement compressors without stopping production.
Blower selection for new construction
When designing the biological stage of treatment facilities, they proceed from the efficiency of decomposition organic pollution. A feature of the process is an environment saturated with oxygen and a sufficient amount of activated sludge. Air supply is an integral part of cleaning, but the most energy-intensive. Reduce energy consumption by installing latest models world and domestic developers. Among the proposed equipment, you need to choose the best in terms of efficiency, price and quality.
The selection of the blower is carried out on the basis of the estimated air flow supplied to the system and the operating pressure. The following criteria serve as feasibility studies for the selection:
- reduction of energy load;
- process automation;
- reducing the cost of capital construction buildings for compressor equipment.
The project must meet the optimization of the process and reduce labor costs. This is the path offered by the world's leading manufacturers. Their models are compact, economical and safe to operate. Latest developments save up to 35% of energy per year, reduce operating costs.
The cost of blowers depends on the use of new components that increase the functionality and efficiency of the model. The reliability of the device, the material for the manufacture of working mechanisms, the type of compressor - everything has a price. Expensive units High Quality have a long service life and pay off within 2-4 years. In the long run, installing them is beneficial.
Associated equipment when installing blowers
When installing the blower in a biological treatment system, you will need additional elements process control. In this case, process sensors and actuators are ordered according to the scheme. The distribution of air in the pool is carried out using disk and plate aerators installed on the air duct. The touch control panel of the unit with the controller allows you to adjust the operation mode in manual and automatic mode.
