Containerized water treatment plant Crystall-NK
Crystall-NK consists of pressure filters Crystall-N and containers of standard shipping dimensions; it retains all technological advantages and benefits. Furthermore, it allows the Customer to save on construction works as the containerized water treatment plant is ready for start-up from the moment of manufacture and requires only connection to pipe utilities. Depending on the existing water supply scheme of the facility, we have developed several standard types of the plant with the capacity from 3 to 100 m3/hour. There is the possibility of development and manufacture of the plants with greater capacity (in multicontainer design).
|Single container dimensions, BxHxL||2.4 x 2.6 x 6.5; 9.4; 12.5 m|
|Capacity||from 3 to 100 m3/hour|
|Water consumption for own needs||0.3-0.5% of capacity|
|Heating system||electric air heater|
|Automation system||full automation of all technological processes|
|Maintenance staff||inspection tour – once every 2-3 days|
The containerized water treatment plant Crystall-N is designed for groundwater treatment in accordance with SanPiN requirements and manufactured in accordance with TU BY 390151606.010-2007. Technological schemes and configuration options allow to apply the plant almost in any schemes of centralized water supply systems of settlements.
The basic element of the water treatment plant is the pressure filter-module Crystall-N manufactured in accordance with TU BY 390151606.004-2008.
Apparent advantages of the containerized water treatment plants Crystall-NK are:
- Full factory readiness;
- Full automation of all technological processes of plant operation;
- Guaranteed quality of equipment and its installation (testing of single elements and the whole system is carried out at the manufactory in accordance with the certified quality system);
- Minimum of construction and mounting works;
- No need in manufacturing facilities;
- Short terms for putting the plant into operation.
Basic and supporting equipment of the containerized water treatment plants of all types is designed for the operating pressure up to 0.6 MPa.
All equipment of the water treatment plants, including tanks and pumps, is placed in transportable universal containers complying with GOST 48477-79. Dimensions (BxHxL): 2438 x 2590 x 6550, 9420, 12460 mm. The containers can be delivered by road or by rail.
Special features of the applied water treatment technology and constructional design
Source water from wells is supplied into the upper filter zone through the water-air ejector where the air cushion of a certain height is created. Excess air together with partially emanated dissolved gases is removed through the air vent.
Oxygen-enriched water enters the filter bed, the grain surface of which is covered with active biofilm from iron/manganese-oxidizing bacteria and oxidation products - hydroxide. As a result of complex autocatalytic physicochemical and biochemical processes, dissolved ferrous iron and manganese oxidize in filter material; its hydroxide evolves at grain surface and in pore space of the bed. In course of work, pressure loss in the filter increases and reaches the limit; it determines the filter cycle time and the need for filter washing.
Depending on local conditions, filter washing can be performed by water from water towers located nearby or with the help of special wash pumps that take water from clean-water tanks. Other methods require careful study and hydraulic calculations. In any case, the calculated mode of washing for intensity, duration and frequency must be provided.
Under the accepted constructional design of the plant, washing intensity should be 16-18 l/cm2, duration - 5-6 minutes.
Filter washing frequency(filter cycle time) depends on iron and manganese content, technological parameters of iron removal processes and its constructional design. The patented technology allows maximally prolong the filter cycle time (up to 7-10 days) and guaranty equal filtration rate at all filters, regardless of the degree of colmatation.
Optimization of the technological process and plant construction allows using the possibilities of aeration methods of groundwater iron removal to the maximum, and at high quality of treated water, helps significantly reduce operating costs by lowering energy and water consumption for its own needs.
Distinctive features of constructional design of the accepted technological process:
- application of water-air ejectors for each pressure filter-module that provides uniform aeration of inflowing water and equalization of filtration rate in all filter-modules, regardless of hydraulic resistance in the filter bed (in case of lack of pressure reserve at the input to the plant, ejectors can be excluded from the technological scheme and replaced by compressor units for oxygen saturation of source water) with retention of the patented features;
- application of a special drain system that is made completely of polymer materials; it provides corrosion resistance and uniform distribution of wash water through the filter area;
- full automation of plant operation that is achieved due to the original technological scheme of filter washing by means of using modern and reliable valves and piping and automation equipment;
- arrangement solutions that allow to place all elements of the iron removal plant in a single container.
The technological process realized in the containerized water treatment plants provides normative quality of drinking water, in case when source water composition meets the criteria of applicability of non-chemical aeration methods of iron removal. If concentration of chemical indicators of water is exceeded, the plants can be equipped with complementary equipment, the parameters of which are determined on the basis of the results of the technological research carried out directly on water from the water-supply source.
Metal containers produced at the manufactory are exposed to additional anti-corrosion treatment and heat treatment, equipped with electric heating systems for design temperature in winter tinside = + 5 °C, with supply and exhaust ventilation.
On site, the containers are mounted on the prepared base with the technological pit for placing V9, V10 and K1 pipelines.
Depending on local conditions, wash water can be discharged into the sewerage system or to sludge storage areas. These areas should be equipped with the drainage with clarified water discharge into the storm water sewerage system or the nearest water flow. Upon availability of well-filtered soil and considering frequency of filter washing and small volume of wash water (≈0.5% of daily capacity), filter storage areas can be organized.
Technical characteristics of containerized water treatment plants
Containerized water treatment plant Crystall-NK-S
These water treatment plants are used for the systems, when water is supplied directly to the water supply network. Their operation mode is the most difficult, that is why such plants are complementary equipped with wash water storage tanks and clean water storage tanks, wash pumps and network pumps. Network pumps are standardly equipped with variable frequency drives to maintain the predetermined pressure in the water supply system.
It is more reasonable to use such plants as local plants for treatment of water coming from single wells or a pattern of wells that supply water to the general water supply system (of any capacity), which has other sources of water supply. The technological scheme of the plant is shown in Pic. 1.
Pic.1 Technological scheme of the water treatment plant Crystall-NK-S
1- water metering unit; 2- water-air ejector; 3- pressure filter-module (quantity is determined by plant capacity); 4- air-vent; 5- automatic wash valve; 6- wash water storage tank; 7- wash pumps; 8- clean-water tank; 9- network pumps; 10- input device; 11- lighting panel; 12- automatic plant control board; 13- container.
The delivery set of the plant consists of the equipment upon positions 1-13 (see Pic. 1) in the amount determined by plant capacity, as well as of a set of manifold pipelines, fittings and control and measuring devices that are not indicated on the scheme. Plant equipment with network pumps and frequency drives is manufactured in accordance with the Customer’s technical data specifying the water consumption mode and the required pressure (it is desirable to bring pump capacity maximally close to well pump capacity).
Automatic operation of the plant is provided by the basic automation system, which includes on/off switching of well pumps depending on water level in clean-water tanks, automation of filter washing mode, on/off switching of network pumps depending on water level in clean-water tanks.
Containerized water treatment plant Crystall-NK-B
These plants are used for the water supply systems with dense location of water wells and in the near of a water tower. It eliminates the need of installation of clean-water tanks and wash pumps. Filter washing is provided by treated water from the tower, which is used to create desired pressure and storage of wash water reserve. The technological scheme of the plant is shown in Pic. 2.
Pic. 2. Technological scheme of the water treatment plant Crystall-NK-B
1- water metering unit; 2- water-air ejector; 3- pressure filter-module (quantity is determined by plant capacity); 4- air vent; 5- automatic wash valve; 6- input device; 7- lighting panel; 8- automatic plant control board; 9- container.
The delivery set of the iron removal plant consists of the equipment upon positions 1-9 in the amount determined by plant capacity, as well as of a set of manifold pipelines, fittings and control and measuring devices that are not indicated on the scheme.
The filter washing system from the tower is provided by the basic automation system. Automation of well operation mode depending on water level in the tower is not included in the delivery set, and can be provided by adapting the existing automation system to the basic one.
Containerized water treatment plant Crystall-NK-R
These plants are used for the water supply systems, when clean-water tanks or the second stage pump station are located (or designed) in the near or they are used for operation with a remote water tower. Therewith, the plant is complementary equipped with the autonomic filter washing system that includes a wash water storage tank and wash pumps. The technological scheme of the water treatment plant is shown in Pic. 3.
Pic. 3. Technological scheme of the water treatment plant Crystall-NK-R
1- water metering unit; 2- water-air ejector; 3- pressure filter-module (quantity is determined by plant capacity); 4- air vent; 5- automatic wash valve; 6- wash water storage tank; 7- wash pumps; 8- input device; 9- lighting panel; 10- automatic plant control board; 11- container; 12- clean-water tanks (existing or being designed).
The delivery set of the plant consists of the equipment upon positions 1-11 (see Pic. 3) in the amount determined by plant capacity, as well as of a set of manifold pipelines, fittings and control and measuring devices that are not indicated on the scheme.
The filter washing system from storage tanks, their filling, on/off switching of wash pumps are provided by the basic automation system. Automation of well operation mode depending on water level in clean-water tanks is not included in the delivery set, and at Customer’s request, can be provided by adapting to the basic automation system.
- Container manufacture for different climatic zones;
- Dispatch system with remote access.
Plants of other capacities are per calculation.