Water Treatment Station and Pump Station II Lift - Water Supply in Abat I Stage

Contents

1 General part

2 Cleaning technology

2.1 Technical characteristics of equipment

2.2 Second Lift Pump Station

2.3 Calculation of reagent dose

2.4 Quality Control

2.5 Station Operation Control

3 Architectural and construction solutions

4 Heating and ventilation

5 Water supply and sewerage

6 Power and lighting equipment

7 Grounding and lightning protection

8 Automation

9 Communication

10 Fire prevention measures

11 Assignment for design of water treatment station and II lifting pump station. OJSC "TYUMEN GIPROVODKHOZ"

Cleaning technology

On the basis of hydrogeological conclusion No. 019/113 dated 01.08.2001, GUPTO TC "Tyumengeomonitoring" in the water of an underground source, an increased content of total iron is observed, as well as values ​ ​ of oxidability and total stiffness. To ensure the quality of source water that meets the requirements of SanPiN 2.14.55996 "Drinking water. Hygienic requirements for water quality of centralized water supply systems. Quality Control. "A cleaning process diagram has been developed, which provides for two-stage filtration.

All applicable equipment supplied by Berkefeld (Germany).

Detailed drawings, explanatory note and operating manual shall be sent by Berkefeld during equipment delivery.

At the first and second stages, two blocked filters operate in parallel. The total capacity of each stage is 46m3/hour.

From artesian well initial water is supplied for purification via two water pipelines with diameter of 150 mm. Inlet pressure is not less than 0.2MPa.

Previously, water is aerated in mixing device by air supply from compressor unit. As a result of aeration, iron ions are oxidized and transferred to hydroxide.

Oxygen dissolved in water is removed when water passes through the oxidizer.

Iron hydroxide is captured on the filters of the first stage and the residual iron content in clarified water will be less than 0.1 mg/l.

Then the water is sent to the jet degasser, in which the process of removing hydrogen sulfide from the water and neutralizing aggressive carbon dioxide takes place .

Intermediate pumps of CR3232 grade from the degasser tank supply water to the second stage of filtration, with coal loading of filters for removal of manganese, flavors, odors and improvement of water taste.

To support the manganese removal process, potassium permanganate solution is introduced into the purified water. The dosing station NM 4100 E includes a dosing pump with a capacity of 4.3 l/h.

Purified water is disinfected with chlorine contained in bound form in calcium hypochlorite solution. The reagent is previously dissolved in the tank, then dosed with dosing pumps with a capacity of 4.3 l/h.

Purified and disinfected water under residual head is sent to clean water tanks.

To remove contaminants accumulating in the filter load, water-air flushing is performed with reverse water current.

Flushing is performed by manual start-up from automatic control board.

The filter backwash system consists of a CR 6411 pump, Q = 120 m3/h and a blower with a capacity of 180 m3/h. Two stage I filters (to remove iron from the water) are washed 2-3 times a week each, depending on the pressure drop on the filter. First, 10 minute air blowing is performed, then air with water for 10 minutes and 10 minutes washing with water.

Washing of the 2nd stage filters (for removal of manganese) is carried out similarly to the 1st stage filters once every 2 weeks.

Water from clean water tanks is used for filter flushing. filters are washed sequentially at pressure drop over 0.5 kg/cm2. flushing of 2-4 filters can be performed during 2-3 hours at night with the least water analysis.

The wash water from the filters is supplied to the wash water sump. water flow rate is ~ 20m3 for washing one filter; the maximum amount of flushing water supplied to the sump is 80m3.

After settling for at least 20 hours, or 2-4 hours using PAA, clarified water of ~ 2/3 volume is evenly pumped out by pump Q = 10m3/hour and supplied to the I stage of purification, which is less than 25% in the total volume of prepared water. The pre-clarified water is UV disinfected with UV sterilizer to avoid unwanted infestation of the filter material with pathogenic bacteria that may form in the sump.

Second Lift Pump Station

To supply purified and disinfected water to the consumer network of the station, pressure increase pumps are installed.

To provide the required head at the outermost point of the water discharge at the outlet of the station, a head of 32m is required. Maximum hourly flow rate is 61 m3/h

The project adopted the pump station of the second lift, consisting of three vertical centrifugal pumps of grade CR 323, one of which is standby, with a power of 5.5 kW motors. Pumps are arranged on common frame, connected by pipelines to common intake and supply. Shut-off valves, pressure gauges, safety valves (check valves), rubber compensators, fastening materials are installed on the pump unit. The pumps are controlled from the control panel with the possibility of:

- cascade actuation of pumps depending on pressure,

- selection of the required pressure ,

- automatic change of pumps operation according to the specified time,

- indicator of operation time of each pump,

- protection against idling.

The station is located on a common frame, fixed on the base of the water treatment unit .

Purified and disinfected water leaves the water treatment station building through two pipelines with a diameter of dy150 mm. Electromagnetic water meter with power supply and indication unit is installed on each pipeline.

In the building of the water treatment station and pump room II lifting, installation of 2 fire-fighting pumps NK80250 with a capacity of 170m3/hour and head H = 80m, P = 55kW, n = 2900 rpm each is provided. The pump is switched on by the duty operator when the signal is received and after the CR 323 pumps are disconnected, which supply water to the network under normal conditions.

Pumps are controlled from the control board with the possibility of soft start-up and automatic change of pumps operation according to the specified time.

In the station, 1 membrane boiler is installed to extinguish hydraulic impacts when the pumps are turned on and to flexibly control the water supply depending on the water intake. Boiler diameter 1m., height - 2.3m., usable vessel 1000l., pressure up to 0.8MPa.

2.3 Calculation of reagent dose

2.3.1. Calculation of air quantity.

The compressor unit needs to supply an amount of air in which the oxygen content is sufficient to oxidize the iron ions in the water to be purified. The operation of the compressor is adjusted for proportional operation with the amount of water supplied for purification.

Oxidation of 1 mg of Fe + 2 requires 0.143 mg of O2. To oxidize 3.9 mg/l of oxide iron in the volume of source water 1000 m3, 558m3 of air oxygen will be required .

2.3.2. Calculation of disinfectant solution.

For decontamination of underground water with a stable effect of bacterial action, as well as convenience in operation, the project adopts a chlorine-containing substance, calcium hypochloride. This is a white powder containing up to 90% of the product. The active chlorine content is 72%. For underground water, the dose of chlorine according to item 6.146 SNiP 2.04.0284 * [1] is taken as 0.7 1000 1mg/l, per day it is necessary to 1543 g of chlorine at full productivity and in terms of calcium hypochloride powder.

The contact time of chlorine with decontaminated water is not less than 1 hour [4].

Concentration of Ca (ClO) 2 solution is 1%. The amount of 1% solution per day is 154.3 liters.

The monthly demand for calcium hypochlorite is 46.3 kg.

Stock storage is not provided in the station building and is brought for one-time refueling from the MUP warehouse serving the station.

2.4 Quality Control

The project provides for only express control of incoming and outgoing water from the station. Water quality shall comply with the requirements of SanPiN 2.1.4.55496 "Drinking water. Hygienic requirements for water quality. " Quality control is carried out according to methodological instructions for implementation and application of SanPin 2.1.4.55996 MU 2.1.4.68297.

To this end, water is delivered to a laboratory equipped with research instruments. The organization of production control and selection of methods for determining the quality indicators of drinking water and water of the water supply source, when assessing the state of measurements in the laboratory, at its certification and accreditation, is carried out according to GOST R 5123298 "Drinking water. General requirements for organization and control methods. " The operation of the laboratory should be organized by the operating service responsible for the quality of drinking water supplied to the consumer or the operating service should conclude an agreement with the accredited laboratory.

Organization of work of production control shall provide measurement conditions allowing to obtain reliable and operational information on drinking water quality in units of values established by GOST 8.417, with error of definitions not exceeding standards established by GOST 27384, using measuring instruments entered in the state register of approved types of measuring instruments and passed verification. Methods used to determine drinking water quality indicators shall be standardized or certified in accordance with the requirements of GOST R 8.563; Methods approved by the Ministry of Health of Russia may be used to determine biological indicators.

The laboratory must comply with GOST R 51000.396 "General requirements for test laboratories" and is subject to accreditation according to GOST R 51000.195 GSS "Accreditation system in the Russian Federation. Accreditation system of certification bodies, testing and measuring laboratories. General requirements. "

Production quality control of drinking water includes:

- determination of water composition and properties of the water supply source and drinking water at the points of water intake, before it enters the water supply network, distribution network;

- incoming control of the availability of accompanying documentation (technical specifications, certificate of conformity or hygienic certificate (hygienic conclusion) for reagents, materials and other products used in the water treatment process;

- input selective control of products used in the water treatment process for compliance with the requirements and regulatory documentation for a particular product;

- in accordance with the process regulations, operational control of optimal doses of reagents administered for water purification;

- development of a control schedule agreed with the territorial bodies of the State Sanitary and Epidemiological Supervision of Russia and (or) departmental sanitary and epidemiological supervision in the prescribed manner, which should contain controlled indicators; Frequency and number of samples taken; Sampling points and dates, etc.;

- emergency information of sanepidnadzor centers on all cases of the results of drinking water quality control that do not comply with hygienic standards, first of all, exceeding microbiological and toxicological indicators;

- Monthly information of sanepidnadzor centers on the results of production control.

Production control of water quality is carried out at water intake points from the water supply source, before it enters the distribution water supply network, as well as at points of the distribution network.

Water quality control at various stages of the water treatment process is carried out in accordance with the technological regulations.

Water samples are taken at the water intake from each well, in clean water reservoirs and in pressure water pipelines from pipeline cranes introduced into the production laboratory from the main control point of the water drain, before entering the distribution network. Sampling points are agreed with the Gossanepidnadzor body.

The quantity and periodicity of water samples at water intake points taken for laboratory tests shall be set in the following order:

o microbiological - 4 times a year according to the seasons of the year;

o organoleptic - 4 times a year according to the seasons of the year;

o generalized indicators - 4 times a year by seasons of the year;

o Inorganic and organic substances at least 1 times a year;

o radiological at least 1 time a year.

Determined parameters and quantity of tested samples of drinking water before its supply to distribution network:

o Microbiological 50 times a year;

o Organoleptic 50 times a year;

o Summarized indicators at least 4 times a year;

o Inorganic and organic substances at least 1 times a year;

o Residual chlorine after water treatment at least 1 time per hour;

o Potassium permanganate - at least 1 time per shift;

o Radiological - at least 1 time a year.

Generalized indicators are determined by regulatory documents using the following devices:

- hydrogen value is measured by pHmetre,

- general mineralization as per GOST 1816472 using gravimetry;

- total hardness as per GOST 415172 by titrometry;

- permanganate oxidability by titrimetry;

- petroleum products by IR spectrophotometry;

- phenol index by spectrophotometry;

Inorganic substances:

- ammonium nitrogen by photometry as per GOST 4192;

- iron by total photometry as per GOST 401172;

- manganese by total photometry according to GOST 4388.

Nitrites and nitrates are determined by photometry according to GOST 18826 or spectrophotometry.

Content of chlorine of residual bound by titrimetry as per GOST 18190.

Organoleptic properties of drinking water: smell, taste are determined organoleptically according to GOST 3351, chromaticity and turbidity by photometry according to GOST 3351.

2.5 Station Operation Control

The process equipment of Berkefeld (Germany) operates in an automated mode. Only the duty operator monitors the operation of the station in shifts. Persons responsible for technical operation and repair of equipment, organization and maintenance of laboratory works, as well as persons responsible for water pipelines work according to the operating organization's instructions.

The operational management of the station is located at the municipal unitary enterprise with. Abatskoye and is carried out by the dispatch service.