Technical description of hot water boiler PTVM-30M
The hot water gas-oil boiler is intended for installation in heating boiler houses as the main source of heat supply for obtaining hot water with a temperature of 150 ° C, used in heating systems, hot water supply for industrial and domestic purposes.
The boiler is a direct-flow boiler with a U-shaped closed layout of heating surfaces. The boiler furnace is completely shielded with pipes Ø60x3 mm, located with a pitch of S=64 mm, and equipped with six gas-oil burners MGMG - 6, installed oppositely on the side walls.
Convective heating surfaces are located in the convective gas duct with side walls, shielded pipes Ø83x3.5 mm, which are risers of convective sections made of pipes Ø28x3 mm. The rear wall of the convective flue is shielded with pipes Ø60x3 mm.
Pipe system of the boiler PTVM-30M rests on a frame frame at 5.14 m.
Load regulation range boilers% of nominal capacity. The change in the heat output of the boiler is carried out by changing the number of operating burners.
Water flow through the boiler must be kept constant, when the heat load changes, the temperature difference of the water at the inlet and outlet of the boiler changes.
Oil-fired boilers, can be equipped with a gas-impulse cleaning device (GIP) to remove external deposits from pipes of the convective heating surface.
Technical description of hot water boilers PTVM-50, PTVM-100, PTVM-120
Water-heating boilers are designed to produce hot water at a temperature of 150 °C in separate boiler houses used in heating systems, hot water supply for industrial and domestic purposes and at thermal power plants.
Boilers PTVM-50 and PTVM-100 can be operated both in the main mode and in the peak mode (for heating network water) from 70 to 150 °С and from 110 to 150 °С, respectively.
Boilers have a tower layout: a convective heating surface is located above the vertical combustion chamber. The combustion chamber is shielded with pipes Ø60x3 mm.
Convective heating surface of boilers PTVM-100 and PTVM-120 consists of eight packages, and boiler PTVM-50- from four packages, it is recruited from U-shaped screens from pipes Ø28x3 mm. The side walls of the convective gas duct are closed with pipes Ø83x3.5 with a pitch of 128 mm and are at the same time risers of the convective half-sections.
Pipe systems of boilers are suspended from the frame by the upper collectors and freely expand downwards.
Boiler PTVM-50 equipped with 12 gas-oil burners MGMG-6 - six on each side.
Boiler PTVM-100
Boiler PTVM-120 equipped with 16 gas-oil burners MGMG-8 - eight on each side.
Each burner is equipped with an individual blower fan.
By agreement, the boilers can also be equipped with foreign and domestic gas burners of the appropriate capacity (having the necessary technical characteristics, a certificate of conformity and a permit for the use of Rostekhnadzor).
Maintenance of the burner, its description and technical characteristics are given in the documentation supplied with the burner.
Boilers have lightweight lining and thermal insulation.
https://pandia.ru/text/78/369/images/image006_45.jpg" alt="(!LANG: Hot water boiler PTVM-50" width="400" height="469">.jpg" alt="Technical characteristics of the boiler PTVM-180" width="800" height="356">!}
Coppers of PTVM with a productivity: 30; fifty; 100 MW.
Hot water boilers PTVM are designed for installation in heating boiler houses as the main source of heat supply for obtaining hot water with a temperature of 150 ° C, used in heating systems, hot water supply for industrial and domestic purposes and at thermal power plants.
Technical characteristics of boilers PTVM-30
The boiler is a direct-flow boiler with a U-shaped closed layout of heating surfaces. The boiler furnace is completely shielded with pipes 060x3 mm, located with a pitch of S=64 mm, and equipped with six MGMG-6 oil-gas burners installed oppositely on the side walls.
The convective heating surfaces are located in the convective gas duct with side walls, shielded pipes 083x3.5 mm, which are risers of convective sections made of pipes 028x3 mm. The rear wall of the convective flue is shielded with 60x3 mm pipes. The pipe system of the PTVM-30 boiler rests on a frame frame at the level of 5.14 m.
Range of regulation of loading of coppers 30 - 100% from nominal productivity. The change in the heat output of the boiler is carried out by changing the number of operating burners. The water flow through the boiler must be kept constant; when the heat load changes, the difference in water temperatures at the inlet and outlet of the boiler changes.
By agreement, the boilers can be equipped with any foreign or domestic gas burners of the appropriate capacity.
Oil-fired boilers can be equipped with a gas-impulse cleaning device (GIP) to remove external deposits from pipes of convective heating surfaces.
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Specifications |
PTVM-30 |
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Type of fuel |
Gas/fuel oil |
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Water pressure at the boiler inlet, no more than, MPa |
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Inlet water temperature, °C |
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The range of regulation of thermal conductivity in relation to the nominal,% |
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Water consumption, t/h |
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Fuel consumption, m/h-gas/kg/h-fuel oil |
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Flue gas temperature, °С, gas/fuel oil |
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Full assigned service life, years, not less |
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Boiler efficiency, %, not less, gas/fuel oil |
It is possible to manufacture a boiler for a pressure of 2.5
Technical characteristics of boilers PTVM-50 and PTVM-100
Boilers PTVM-50 and PTVM-100 can be operated both in the main mode and in the peak mode (for heating network water) from 70 to 150°С and from 110 to 150°С, respectively.
The boilers have a tower layout: a convective heating surface is located above the vertical combustion chamber. The combustion chamber is shielded with pipes 060x3 mm. The convective heating surface of the PTVM-100 boilers consists of eight packages, and the PTVM-50 boiler - of four packages. It is assembled from U-shaped screens from pipes 028x3 mm. The side walls of the convective gas duct are closed with pipes 083x3.5 with a pitch of 128 mm and are at the same time risers of the convective half-sections. The pipe systems of the boilers are suspended from the frame by the upper collectors and expand freely downwards.
The PTVM-50 boiler is equipped with 12 MGMG-6 oil-gas burners - six on each side. The PTVM-100 boiler is equipped with 16 MGMG-8 oil-gas burners - eight on each side. Each burner is equipped with an individual blower fan. By agreement, the boilers can be equipped with any foreign or domestic gas burners of the appropriate capacity.
Oil-fired boilers can be equipped with a gas-impulse cleaning device (GIP) to remove external deposits from pipes of convective heating surfaces.
The boilers have a lightweight pipe lining and thermal insulation, and are supplied without casing. Lining and insulating materials are not included in the scope of delivery.
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Specifications |
PTVM-50 |
PTVM-100 |
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Nominal heat output, MW (Gcal/h) |
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Type of fuel |
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Water pressure at the inlet to the boiler, no more than, MPa |
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Water pressure at the outlet of the boiler, not less than, MPa |
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Inlet water temperature, °С (basic/peak) |
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Outlet water temperature, °C |
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Hydraulic resistance, MPa |
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Range of regulation of heat output in relation to the nominal,% |
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MINISTRY OF ENERGY AND ELECTRIFICATION OF THE USSR
MAIN SCIENTIFIC AND TECHNICAL DEPARTMENT OF ENERGY AND ELECTRIFICATION
STANDARD INSTRUCTIONS
FOR OPERATION
GAS AND OIL WATER HEATING
BOILERS TYPE PTVM
TI 34-70-051-86
SOYUZTEKHENERGO
Moscow 1986
DEVELOPED by the Production Association for the adjustment, improvement of technology and operation of power plants and networks "Soyuztechenergo"
PERFORMERS L.I. BONDARENKO, I.M. Gipshman, O.A. EFROIMSON, I.V. PETROV
APPROVED by the Main Scientific and Technical Department of Energy and Electrification on 10.03.86
Deputy Head D.Ya. SHAMARAKOV
The validity period is set from 07/01/86 to 06/30/96.
This Standard Instruction establishes the general procedure, sequence and conditions for performing the main technological operations that ensure trouble-free and economical operation of PTVM type boilers.
The instruction is drawn up in relation to PTVM type boilers equipped with control and measuring equipment, technological protections, interlocks and alarms.
On the basis of the Standard Instructions and the instructions of manufacturers, local instructions should be developed taking into account the features of schemes and equipment, the type and characteristics of the fuel being burned. When compiling local instructions after reconstruction, certain provisions of the Standard Instruction may be changed only on the basis of relevant experimental data after agreement with Soyuztekhenergo.
When operating boilers of the PTVM type, in addition to the Standard Instructions, it is necessary to be guided by the following regulatory and technical documents: Rules for the Design and Safe Operation of Steam and Hot Water Boilers (M.: Nedra, 1982); Rules for the technical operation of power plants and networks of the Russian Federation: RD 34.20.501-95 (M.: SPO ORGRES, 1996); Quality standards for make-up and network water of heating networks (Moscow: SPO Soyuztekhenergo, 1984); Standard instruction for operational chemical cleaning of hot water boilers (Moscow: SPO Soyuztekhenergo, 1980).
With the release of this Standard Instruction, the “Typical Instruction for the Operation of Gas-Oil-Oil Heating Boilers of the PTVM Type” (M.: SPO Soyuztekhenergo, 1979) becomes invalid.
. BOILER BUILDING
1.1. Preparatory operations
Ignite one of the ignition burners on gas according to p. , , ;
Close the valves on the fuel oil line in front of the burner;
Make sure that the burner flame is stable;
Close the burner safety plug valve;
Blow out the nozzle with steam and slide it out of the burner.
Ignite one of the kindling burners on fuel oil according to p.p. , , , , ;
Close the valves on the gas pipeline in front of the burner:
Make sure that the nozzle flame burns steadily;
Open the safety plug valve on this burner.
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Circulation scheme |
Minimum allowable water consumption, t/h |
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PTVM-50 |
4-way (main mode) |
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2-way (peak mode) |
1100 |
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PTVM-100 |
4-way (main mode) |
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2-way (peak mode) |
1500 |
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PTVM-180 |
2-way |
3000 |
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Dissolved oxygen О 2, mg/l |
Free carbon dioxide CO 2 , mg/l |
Phenolphthalein alkalinity mg-eq/l |
pH value |
Oils and heavy oil products, mg/l |
Carbonate index I K, (mg-eq/kg) 2 |
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open |
Not more than 0.02 |
Ots. |
0,1 - 9,0 |
Not more than 0.3 * |
No more than 5.0 |
Not more than 1.0 |
Not more than the average annual allowable concentrations (MAC) established by the current radiation safety standards |
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Closed |
For more than 0.02 |
Ots. |
0,1 - 0,5 ** |
8,3 - 9,5 |
Not more than 0.5 |
No more than 5.0 |
Not more than 1.0 |
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* In agreement with the SES, 0.5 mg / l is possible. ** The upper limit is for deep water softening. |
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70 - 100 |
101 - 120 |
121 - 130 |
131 - 140 |
141 - 150 |
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* For operating heat supply systems fed with sodium-cationic water, I K should not exceed 0.5 (mg-eq / kg) 2 for heating network water temperatures of 121 - 150 ° C and 1.0 for 70 - 120 ° C. |
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Temperature, °С |
The value of the indicator for the heat supply system |
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open |
closed |
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Dissolved oxygen, mg/l |
131 - 150 |
Not more than 0.05 |
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Free carbon dioxide, mg/l |
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R n |
8,3 - 9,0 |
8,3 - 9,5 |
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Suspended solids, mg/kg |
No more than 5.0 |
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Oils and oil products, mg/kg |
Not more than 0.3 |
Not more than 1.0 |
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Carbonate index, (mg-eq/kg) 2 |
70 - 100 |
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101 - 120 |
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121 - 130 |
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131 - 140 |
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141 - 150 |
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2.15. The quality of make-up water of open heat supply systems must meet the requirements of GOST 2874-82 "Drinking Water". The make-up water of such systems should be subjected to coagulation if the color of the sample when boiled for 20 min. Increases in excess of the norm specified in this GOST.
4.2.14. Breakage of the fuel oil or gas pipeline within the boiler.
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Signs of a violation |
Actions of personnel to eliminate the violation |
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1. Deterioration of the combustion process |
The torch is unstable, has dark stripes and luminous "stars"; torch smoke, its separation, separation of fuel oil on the screens of the furnace and under the boiler; the appearance of products of chemical incompleteness of combustion, pulsation in the furnace |
1. Restore the boiler operation mode in accordance with the regime map. |
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2. Blow steam through the boiler nozzles one by one; if necessary, remove them, disassemble and wash with light fuel. Check the injectors on the water stand. |
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3. Check the condition of the vanes of the burners |
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2. Exhaust gas temperature rise |
Inconsistency of flue gas temperature values with regime map |
1. Set the fuel-air ratio according to the regime map. |
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Boiler heating capacity limitation by draft |
The boiler does not take the rated load |
2. Clean the convective heating surfaces of the boiler from ash deposits. |
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3. Check the condition of the boiler lining |
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3. Fistulas in heating surfaces |
Water flow under the boiler |
1. Determine the location and nature of the damage, report to the shift supervisor of the power plant. |
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2. Check the compliance of the make-up water quality with the established standards; |
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4. Deterioration of make-up water quality |
According to the chemical plant |
1. Notify the shift supervisor to take action to eliminate the violation. |
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2. Reduce the boiler heat output to the minimum allowable, temporarily turn off the recirculation system, if possible, increase the water pressure in the direct heating main. |
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3. Strengthen the control of the heating surfaces. |
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4. If necessary, by order of the chief engineer of the power plant (head of the heating boiler house), stop the boiler |
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5. Lowering the temperature of the water at the inlet to the boiler below 60 °C (for gas) and 70 °C (for fuel oil) |
According to the KIP |
1. Notify the shift supervisor of the power plant (heating boiler). |
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2. Increase the share of recirculated water at the boiler inlet, increase heating of network water in network heaters (at CHPP) to maintain the required water temperature at the boiler inlet |
. BASIC INSTRUCTIONS FOR SAFETY, EXPLOSION AND FIRE PROTECTION
Safety precautions for the operation of hot water boilers of the PTVM type do not have specific features that differ from the general rules observed during the operation of steam and other types of hot water boilers, and must satisfy:
"Rules of explosion safety when using fuel oil and natural gas in boiler plants" (Moscow: SPO Soyuztekhenergo, 1984);
Appendix 1
Gas-fired hot water boilers PTVM-50, PTVM-100 and PTVM-180 are water-tube, once-through, with forced circulation, tower layout, have a fully shielded combustion chamber and convective packs located above it. On PTVM-180 boilers, the combustion chamber is divided into three parts by two-light screens.
Boilers PTVM-50 and PTVM-100 can be installed with individual chimneys located above them, or connected to a common chimney. Boilers PTVM-180 work only on a separate chimney.
The main data on the design of boilers are given in Table. P2.1.
The heat output of PTVM type boilers is regulated by changing the number of operating burners at a constant water flow and a variable temperature difference. Adjustment range 25 - 100%.
The boilers are equipped with oil-gas burners with individual draft fans. The design of the burners provides for peripheral gas supply and mechanical sawing of fuel oil. There is no air heating on the boilers.
The convective part is assembled from blocks, each of which consists of sections of U-shaped coils with risers placed on the front and rear walls of the convective part of the boiler.
The coil pipes of each section are welded in four places with vertical spacers.
In the course of gases, the convective part is divided into two packages, the repair gap between which is 600 mm.
On boilers PTVM-50 and PTVM-100, switching from a two-way circulation scheme to a four-way one is provided by installing plugs on the collectors and pipelines connecting the boilers with the direct and return lines (Fig. and).
The PTVM-180 boiler is designed to operate only according to a two-way circulation scheme (Fig. ).
To remove ash deposits from pipes of convective heating surfaces, the project provides for water washing of a stopped boiler. Wash water is supplied to the pipe system with nozzles located in the gas box above the convective part, and is distributed over the outer surface of the pipes of the convective sections. The lining of the boilers is lightweight, attached directly to the pipes and consists of three layers of heat-insulating materials: fireclay concrete on aluminous cement, mineral wool in the form of mattresses in a metal mesh with a sealing gas-tight coating that provides waterproofing of the boilers from atmospheric precipitation. The total thickness of the lining is 115 mm.
152,6
184,4
The volume of the combustion chamber, m 3
Surface of the convective part, m 2
1170
2999
5500
Overall dimensions along the axes of the boiler, mm
width
5160
6900
12196
depth
5180
6900
6900
Height of the boiler from the floor level to the transition flue, mm
13500
14450
13200
Screen pipes diameter, mm
60 ´ 3
60 ´ 3
60 ´ 3
Step between pipes, mm
Pipe diameter of the convective part, mm
28 ´ 3
28 ´ 3
28 ´ 3
Steps, mm:
transverse
longitudinal
Diameter of convective riser pipes, mm
83 ´ 3.5
83 ´ 3.5
83 ´ 3.5
Number of burners and draft fans, pcs.
Nominal water consumption, t/h:
with a two-way scheme
1100
2140
3860
with a four-way scheme
1235
Hydraulic resistance of the boiler, MPa (kgf / cm 2):
with a two-way scheme
0,056 (0,56)
0,096 (0,96)
0,106 (1,06)
with a four-way scheme
0,096 (0,96)
0,215 (2,15)
inlet water temperature,°C
in peak mode
in main mode
Estimated flue gas temperature at rated load,°C
Boiler aerodynamic resistance, mm water column
26,7
25,7
24,0
21,8
28,5
Estimated efficiency at rated load, %
87,8
83,7
88,6
86,8
89,0
86,8
Estimated fuel consumption at rated load, m 3 / h (kg / h)
7270
6460
14100
Inlet water temperature, °С
Outlet water temperature, °C
Minimum water pressure behind the boiler, MPa (kgf / cm 3)
Number of working burners, pcs.
Fuel pressure behind the regulating body, MPa (kgf / cm 2)
Oil temperature in front of the burners (when operating on oil),°C
Flue gas temperature, °С
Vacuum at the top of the furnace, Pa
Appendix 4
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Main disadvantages |
Solutions |
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1. Hydraulic scheme |
Insufficient stability, the presence of downward movement of the medium in the screens |
Changing the hydraulic circuit by organizing additional mixing of the medium, installing hydraulic jumpers, switching to the lifting movement of water in the screens. First of all it is recommended at the peak mode of the two-way scheme; for boilers operating on a network with reduced pressure; in systems with a possible decrease in flow and pressure (with open water intake); with simplified water treatment methods |
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2. Network pipelines |
Low water pressure behind the boiler due to the operating conditions of the heating network |
Installation of control valves on the direct pipeline of the heating system. Recommended for facilities with pressure behind the boiler below 1.0 MPa |
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3. Convective surfaces |
Increased heat absorption and uneven heating of the lower convective package. Small pitches of pipes in the convective part |
Changing the design of convective packs with their additional division and reduction of pipe heating unevenness. Increasing steps in the convective part. Recommended especially for oil-fired boilers |
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4. Water method for cleaning external heating surfaces |
Increased rate of external corrosion of metal pipes of heating surfaces. The need to organize a flush water neutralization scheme |
Changing the method of cleaning heating surfaces: |
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a) shot blast cleaning system; |
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b) gas-pulse cleaning system. |
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When using "dry" cleaning methods, the reliability of heating surfaces and their service life increase |
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5. Absence of a scheme for acid washing of the internal heating surfaces of the boiler |
Growth of hydraulic resistance and increase in temperature of metal of heating surfaces |
Design and install an acid flush scheme |
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6. No air preheating |
Freezing of the impellers of fans and limitation of their pressure and performance |
Arrange pre-heating of air using heaters or exhausted convective surfaces installed in suction air ducts; in the first case, steam and network water can be used as a heating agent, in the second - network water |
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7. Significant discrepancies in the performance of blower fans |
Disorganization of the furnace regime |
Equalization of fan performance by reducing the gaps between the impeller and the fan housing |
Boilers of the PTVM series are designed to produce hot water with temperatures up to 150 `С in separate boiler houses for use in heating, ventilation and hot water supply systems for industrial and domestic facilities and at thermal power plants.
Hot water heating boiler PTVM- peak cogeneration water-heating gas-oil, i.е. can be used to cover the peak part of the thermal load curve.
Initially, it was deciphered as - "peak heating water heating on fuel oil", but later in Moscow all these boilers were transferred to gas.
Boilers of the PTVM series have the following modifications: PTVM-30, PTVM-50, PTVM-60, PTVM-100, PTVM-120 and PTVM-180, respectively, increasing heat output (Gcal / hour).
All PTVM boilers are basically similar in design, have a tower layout and are made in the form of a rectangular shaft, in the lower part of which there is a fully shielded chamber furnace.
The boilers are assembled either from the same or similar elements, which ensures the unification of their production. The design of these units allows semi-open installation. In this case, only the lower part of the boiler is enclosed in the room, where burners, fittings, automation and blowers are located. This reduces the cost of building a heating plant and creates convenience for summer repairs.
For all boilers except PTVM-180, it is possible to install them both with a steel chimney directly supported on the boiler frame, and with a free-standing reinforced concrete or brick chimney.
PTVM-30 and PTVM-50 are installed at regional thermal stations (RTS). PTVM-50 are the main equipment of the RTS of the Moscow fuel and energy complex (at least until 2000). More powerful PTVM-100 and PTVM-120 are installed both at the RTS and at the CHPP. And finally, powerful PTVM-180 only at CHP.
Technical characteristics of the boiler "PTVM-30M"
Boilers PTVM-Z0 are designed to produce hot water with a pressure of up to 13.5 MPa and a temperature of 150`C, used in heating and hot water supply systems, as well as for technological purposes.
The boiler furnace is completely shielded with Ø160x3 mm pipes spaced at S=64 mm spacing and equipped with six oil-gas burners mounted opposite on the side walls.
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Technical characteristics of boilers "PTVM-50 - 120"
| Specifications | PTVM-50 | PTVM-60 | PTVM-100 | PTVM-120 |
|---|---|---|---|---|
| Fuel | gas/fuel oil | |||
| Heat output, MW | 58,2 | 69,8 | 116,3 | 139,6 |
| Estimated (overpressure) water pressure at the boiler inlet, MPa | 1,6 | |||
| Inlet water temperature, `С | 70 | |||
| Outlet water temperature, `С | 150 | |||
| Heating capacity regulation range in relation to the nominal, % | 30-100 | |||
| Hydraulic resistance MPa, no more | 0,25 | |||
| Water consumption through the boiler, t/h | 618 | 743 | 1235 | 1399 |
| Specific consumption of reference fuel (calculated), m3/MWh / kg/MWh | 154/132 | 156/134 | 156/134 | 155/133 |
| Boiler efficiency, gross, %, not less, gas (fuel oil) | 92,8 (91,1) | 91,7 | 92,3(90,1) | 92,3 |
| Specific emission of nitrogen oxides, not more, gas (fuel oil) | 0,23 (0,34) | |||
| Boiler metal mass, kg, calculated (with pipe) | 106000 | 144000 | 245500 | 245500 |
| Average service life before decommissioning, years, not less than | 20 | |||
