Gas supply of the boiler blood center

Contents

Basis of Design

Main Design Solutions

Brief description of the construction area

Gas supply

Requirements for the designed gas pipeline

Gas component composition

External Medium Pressure Gas Line

Boiler room gas equipment

GRU-07-2U1 with two reduction lines

KKS-KVa-1000Gn boiler unit

Burner selection

Internal gas pipeline

Gas Pipeline Blowdown and Testing

Measures on anti-corrosion protection of the gas pipeline

Safety measures

Inspection of welded joints

Mechanical tests

Architectural and construction solutions

Boiler house

Gas well

Special protective measures

Heat and mechanical part of boiler house

Water supply and sewerage

Heating and ventilation

Electrical lighting and electrical equipment

Low-current networks

Protection against natural disasters and emergencies

Environmental protection activities

List of regulatory documents for design

2. Main Design Solutions

As part of the working project "Construction of Blood Center of III categories in Aktau,

34 "a" μr. the construction of a boiler house was designed (Album 2). The boiler room is designed for heat supply with hot water and heat for heating and ventilation of the main building and the housing unit with vivarium.

The project provides for the construction of a boiler house:

● External gas supply networks.

● Internal gas supply networks.

● Thermomechanical solutions.

● Architectural and construction solutions.

● Water supply and sewerage.

● Heating and ventilation.

● Electrical lighting and electrical equipment.

● Fire alarm (as part of the PS main body of the Blood Center)

● Low-current networks.

3. Brief description of the area

Climatic construction area - IV. Subarea-D as per SNiP 2.04012001.

- Weight of snow coating - 50 kgf/m2.

- Absolute maximum air temperature - + 470С

- Standard wind speed head - 48kgf/m2.

- Absolute minimum air temperature of the hottest and coldest

months - + 280С and 190С.

- Average long-term rainfall - 140 mm

- Average wind speed - 5.1sec.

- The percentage of stiff days is - 12%.

- Soils are highly corrosive to steel.

4. Gas supply

4.1 Requirements for the designed gas pipeline.

The gas pipeline was designed in accordance with the requirements of MSN 4.0301.2003, Safety Rules for Gas Facilities and SNiP RK 4.02082001 "Boiler Plants."

Construction organization and requirements to construction organizations in accordance with SNiP RK1.03062002 and p.2.2 of the Gas Safety Regulations.

Welding, insulation and other construction and installation works during the construction of gas supply systems shall be carried out in accordance with the requirements of MSN 4.03012003.

During the construction process observe the requirements for occupational safety and safety in accordance with SNiP RK 1.03052001.

Construction control and commissioning shall be carried out in accordance with SNiP RK 1.03062002, taking into account the requirement of Chapter 10 of MSN 4.03012003 and Item 2.2 of the Gas Safety Regulations.

4.3 External medium pressure gas pipeline.

The project provides fuel supply for the autonomous boiler house.

The gas supply of the boiler blood center in 34a μr was developed in accordance with specification No. 16/1208/1672 of 14.10.08. issued by Aktaugazservice JSC and the current norm and rules of RK MSN 4.03012003, SNiP 3.050288.

The point of connection of the designed medium pressure gas pipeline to the existing underground medium pressure gas pipeline with a diameter of 159x4.5mm at 0.08 m. Gas pressure in a point of connection of Ru of =3kg/cm2.

The design provides for the installation of a gas well with shut-off valves and underground laying of a medium pressure gas pipeline 0, 3MPa from PE GAS pipes SDR11 Dn 63x5.8mm

At the entrance to the boiler building, the gas pipeline is equipped with a Du 80 disconnecting device.

The total length of the Dnipro gas pipeline network is 228 .8 m. The depth of the gas pipeline is 0.8 m. Compensation of the gas pipeline from the effect of temperature stresses is carried out due to the angles of rotation of the network.

Installation works on underground laying of gas networks and elements should be performed mechanically in compliance with the requirements of SNiP 5.01012002 "Earthworks. Bases and bases" and MSN 4.03012003 "Gas-distributing systems".

After installation, the gas pipeline should be tested for tightness with a pressure of 0.01MPa with a test duration of-5min. (according to MSN 4.03012003 Table 17)

4.4 Boiler room gas equipment

Two KKSKVa1000G boilers are to be installed in the boiler room. 1 boiler-second backup is constantly in operation. A turbine gas meter STG80160, Qmin/Qmax = 8-160m3/hour is provided to account for gas consumption and flow to GRU .

The following are installed inside the combustion chamber after the gas injection in the direction of gas movement: a heat-intake valve, a shut-off gas electromagnetic valve KZGEM Du80 (supplied as part of the gas gas detector UKZRUSN (2)). Actuation (closing) of the fast-acting solenoid valve is carried out by the pulse of the automatic gas content control system, the alarm and control unit of the WCD (equipped with light and sound alarm) of which is installed in the first floor of the main body, in the working area at a height of not more than 1.5 m, and its sensors directly in the furnace room.

GRU072U1 is installed on the wall to reduce the medium pressure gas to the required average pressure, and automatically maintain the specified output pressure regardless of the change in flow rate and inlet pressure inside the boiler building.

Connection of gas devices to gas pipelines is specified in place during installation in accordance with the certificates of the gas equipment accepted for installation.

4.9 Inspection of welded joints.

Mechanical tests of butt welded joints of pipelines are carried out in accordance with the requirements of GOST 699699 *. Quality control of anticorrosive coatings for steel thickness, adhesion and continuity - as per GOST 9.60289 *

4.10 Mechanical tests.

Test (tolerance) and welded joints of steel gas pipelines not subject to physical control shall be subjected to mechanical tests.

Joints of steel gas pipelines shall be tested for static tension and for bending or flattening as per GOST 699666 *. If the test results are not satisfactory at least at one joint, all joints welded by this welder during the calendar month at this site by gas welding shall be removed and joints welded by arc welding shall be checked by radiographic inspection. The results of mechanical tests of the weld joint are considered unsatisfactory if:

average arithmetic value of the ultimate strength during tensile test of the lower ultimate strength of the main pipe metal established by GOST (TU);

tensile joint strength test is less than permissible standard clearance between pressing surfaces of press, when the first crack occurs on weld joint during joint flattening test is more than 5S, where S is pipe wall thickness.

5. Architectural and construction solutions

5.1 Boiler room

The boiler building in the plan has dimensions of 15.0x7.2m in axes. The building is one-story, stone.

Foundations - strip of concrete blocks as per GOST 1357978 *.

External walls made of M35 shell stone according to GOST 400184 with a thickness of 390mm, partitions made of M35 shell stone with a thickness of 190mm. Masonry is carried out on M50 cement sand mortar.

Coating - profiled sheets on metal beams from channel No. 20.

Jumpers - prefabricated railway/concrete according to 1.0381 series, eff. 4.

Window locks - metal-plastic according to GOST 215192003 with the device of window sills and drains.

Door locks - external and internal as per GOST 311732003 and GOST 662988, respectively.

Gate - metal ploughed ind.productions.

See sheet AC11 for room finishes and floor explication.

External facade decoration - improved plaster with subsequent facade painting.

Basement - facing with tiles such as "torn stone" with a height of 300mm.

Pavement - asphalt concrete with a width of 1.0 m.

The construction part of the project is performed in compliance with the existing norms and rules, complies with the norms and rules of explosion fire safety of the Republic of Kazakhstan and ensures safe operation of the designed facilities.

5.2 GC gas well.

The GC plan is 2.4x2.4m. The well is made monolithic iron-concrete of concrete. B12.5 (refer to GS, AS-1 sheet).

5.3. Special protective measures

Corrosion protection of construction structures is provided in accordance with SNiP 2.03.1185 "Protection of construction structures against corrosion"

Anticorrosive measures for underground parts of buildings are carried out by: performing them from concrete of increased grades in terms of waterproof and sulphate resistance of cement, painting with hot bitumen in 2 times on a primer of 40% bitumen solution in kerosene.

Metal structures and equipment are protected against corrosion:

- external - by painting with oil paint on the primer.

- underground - by applying insulation of a very reinforced type.

6. Heat and mechanical part of boiler house

The boiler house project envisages the installation of two KKSKVa1000G boilers (1 standby) for the heating of the Blood Center facilities. The boiler room belongs to category "G" in terms of explosion safety.

The thermal and mechanical part of the project is made for Aktau with a design ambient temperature of 15 degrees. Heating capacity for heating is -Q = 0.403MW, for ventilation - Q = 0.205MW and for hot water supply - Q = 0.174MW.

The source of water supply is the city water supply network, the quality of which meets the water requirements according to GOST 287473 "Drinking water."

The coolant is water with a design temperature of 9570 deg. For hot water supply water with temperature 55gr.

Circulation of network water in pipelines is carried out by pumps of the DAB K25/1200T brand.

Water treatment

The project adopted the treatment of the source water for making up the heating system, the source water is supplied to the ERCE500 chemical water treatment plant, where a filter softener is installed in it of backfill material-resin for removing hardness salts, and more to the makeup tank with a volume of 3m3.

From make-up tank by pumps JP BASSIC 5 to return pipeline of heating system. When the pressure in the heating system decreases to 0.1MPa, make-up pumps are switched on, when the pressure rises to 0.3MPa, they are turned off.

To prevent hydraulic shock, a membrane expansion tank is installed and a filter D150mm is installed on the return pipeline to clean the coolant from mechanical impurities.

Thermal insulation of pipelines

Isolate all pipelines except drain ones. Before insulation perform anticorrosive coating with PF115 paint for 2 times using GF020 primer for 1 time.

Heat insulation layer for pipes mineral wool 50mm thick. Coating layer-fiberglass PCT,

7. Water supply and sewerage

The internal water supply and sewerage networks of the boiler house are designed as follows:

● Technical water supply for household and fire-fighting needs.

● Drinking water supply for boiler makeup.

● Domestic sewerage system.

●Proizvodstvennaya sewage system.

Boiler house water supply is provided from external designed networks of drinking and technical water pipelines.

Drinking water supply is supplied for filling and makeup of the heating system. The system of a drinking water supply system is carried out from polyethylene pressure head pipes PE80 SDR17 by diameter 63kh3,8mm (GOST 185992001) and steel water gas pipelines with a diameter of 57х3.5 and 25kh2.8mm in accordance with GOST 326275.

Service water supply is supplied to household and fire-fighting needs. The system of a technical water supply system is carried out from polyethylene pressure head pipes PE80 SDR17 by diameter 63kh3,8mm, PE63 SDR11 diameter 16kh2,0mm (GOST 185992001) and steel water gas pipelines diameter 57kh3,5mm in accordance with GOST 326275.

Internal fire extinguishing of the building is carried out by fire cranes. The water flow rate for internal fire extinguishing of the building is 2 jets of 2.5 l/s.

Domestic and industrial sewage systems are designed in the building.

Domestic sewerage is designed to drain effluents from sanitary devices to the external sewerage network. The production sewer is designed to discharge water from boilers and ramps installed in the furnace hall to the blowdown pit.

The internal network of sewage systems is designed from polyethylene sewage pipes with a nominal diameter of 50 and 100 mm according to GOST 22689.089.

Technical indicators:

estimated drinking water consumption is 4.0m3/day.

Design flow rate of service water is 0.30m3/day.

Design flow rate for internal fire extinguishing is 2.5l/s.

Effluent flow rate - 0.30m3/day.

8. Heating and ventilation

Coolant - water.

Heat carrier parameters: - the maximum temperature in the giving main pipeline, T1 + 55 C.

The following are accepted as heating devices: cast-iron radiators MS140, steel water and gas pipes Dn20x2.8mm. The ventilation system of the building is designed as natural - exhaust, according to the requirements of SNiP RK 2.04012001, SNiP RK 4.02052001, SNiP RK 3.02022001.

Independent exhaust ventilation systems are designed for furnace rooms. Air from furnace rooms is removed mechanically by means of the roof BP86772,5 fan. The inflow of air into the boiler room is carried out unorganized, due to infiltration through the enclosing structures and the looseness of the door and window openings. Air removal of the rooms of the bathroom and rest room is carried out through plastic grilles RAR 100x100 fixed to a steel duct of rectangular section made of sheet steel. 0.55 mm (GOST 2475181). Material for manufacturing air ducts - sheet steel (GOST 2475181) is selected based on the characteristics of the medium transported through it (temperature, humidity, speed of air movement).