Selecting a continuous blowing separator. Design and purpose of a continuous blowing separator Design and principle of operation of a continuous blowing separator
Separators and expanders for continuous and periodic purging are designed to separate into steam and water the steam-water mixture formed from the blowdown water of steam boilers, condensate from steam receivers, drainage of steam lines when its pressure is reduced to the pressure in the separator (expander), with the subsequent use of heat from water and steam.
Separators and expanders can be used in condensate collection systems to reduce the consumption of steam and heat losses from the discharged steam-condensate mixture.
The expanders have the simplest separating device - a tangential supply of condensate (blow-out water).
In addition to the tangential supply of condensate (blowdown water), the separators are equipped with vertical louvered drop eliminators for drying the secondary boiling steam.
Modifications
This section presents serial separators and expanders:
Separators and expanders are manufactured in accordance with TU 3113-005-68215545-2014.
The plant has the ability to develop and manufacture separators (expanders) according to technical specifications.
Design and principle of operation of a continuous blowing separator
The separator is a vertical cylindrical vessel welded structure and consists of a body with a lower elliptical bottom welded to it; The upper elliptical bottom is connected to the body using a flange connector.
In the middle part of the body, 2 or 4 supports are welded for installing the separator in a suspended state on support beams.
In the lower part of the housing there is a receiving device, consisting of two concentrically installed shells and two tangentially welded pipes into the housing, designed to receive tangentially supplied purge water.
In the upper part of the housing, a separating device is bolted to the ring, consisting of a set of specially bent blades and designed to separate small drops of water from steam.
A constant level of separated water is automatically maintained by a float level regulator built into the DN 150 fitting in the lower part of the housing.
To visually monitor the level of separated water, the separator is equipped with a water-indicating device, consisting of a water-indicating glass and valve-type taps.
To monitor the operating pressure in the steam space of the separator (for separators SP-0.28-0.45; SP-0.7-0.6; SP-1.4-0.8; SP-1.5-0, 8); There is a pressure gauge indicating a measurement limit of up to 1.6 MPa (16 kgf/cm 2) with a 3-way purge valve and a drain valve.
Cutting off steam pressure in the housing above the permissible level (7.5 kgf/cm2) is ensured by a full-lift flanged safety valve DN 50 Ru 16 kgf/cm2, equipped with a replaceable spring type I, operating at a pressure in the range of 7-13 kgf/cm2. Valve operation is adjusted to a pressure of 7.5 kgf/cm 2 . Top part The valve is closed by a cap, which contains an adjusting screw for setting the spring to a given pressure. Safety valve in the separator SP-0.15-0.3 ( operating pressure 0.06 MPa) is not provided.
The operation of the separator is to receive a steam-water mixture from the boiler, dividing it into steam and water due to the expansion and rotational movement of the flow in the separator receiving device. A precipitation operation takes place in the receiving device. The steam is finally dried in a separating device.
Specifications
RUB 123,000
115,500 rubles including VAT.
Production 15-20 working days. Guarantee of terms. We fulfill our obligations for prompt and high-quality delivery.
167,000 rubles including VAT.
Production 20 working days. Guarantee of terms. We fulfill our obligations for prompt and high-quality delivery.
RUB 245,000
RUB 235,500 including VAT.
Production 25-30 working days. Guarantee of terms. We fulfill our obligations for prompt and high-quality delivery. 295,000 rubles including VAT. Separators
continuous blowing
The separator is a vertical cylindrical vessel of a welded structure and consists of a body with a lower elliptical bottom welded to it; The upper elliptical bottom is connected to the body using a flange connector. In the middle part of the body, 2 or 4 supports are welded for installing the separator in a suspended state on support beams.
In the lower part of the housing there is a receiving device, consisting of two concentrically installed shells and two tangentially welded pipes into the housing, designed to receive tangentially supplied purge water.
In the upper part of the housing, a separating device is bolted to the ring, consisting of a set of specially bent blades and designed to separate small drops of water from steam.
A constant level of separated water is automatically maintained by a float level regulator built into the fitting at the bottom of the housing.
To visually monitor the level of separated water, the separator is equipped with a water-indicating device, consisting of a water-indicating glass and valve-type taps.
To monitor the working pressure in the steam space of the separator, there is a pressure gauge indicating a measurement limit of up to 1.6 MPa with a 3-way purge valve and a drain valve.
Cutting off steam pressure in the housing above the permissible level (0.75 MPa) is ensured by a full-lift flange safety valve, equipped with a replaceable spring operating at a pressure in the range of 0.7-1.3 MPa. Valve operation is adjusted to a pressure of 0.75 MPa. The upper part of the valve is closed by a cap, which contains an adjusting screw for setting the spring to the specified pressure.
The operation of the separator is to receive a steam-water mixture from the boiler, dividing it into steam and water due to the expansion and rotational movement of the flow in the separator receiving device. The steam is finally dried in a separating device.
The continuous purge separator is selected based on the purge water flow rate
where is the consumption of residual water at the outlet of the SNP, t/h;
Steam consumption at the outlet of the SNP, t/h
Based on the given conditions, we select separators of the SP-0.28-0.45 brand produced by the Saratov Power Engineering Plant. The main characteristics of SP-0.28-0.45 are given in the table. dimensions are indicated in Figure 3.3.3.
Table 3.3.3 - Technical characteristics of SP-0.28-0.45
Figure 3.3.2 - Overall dimensions of the separator SP-0.28-0.45: A-fitting of the level regulator; B-supply of steam-water mixture; B-output of separated steam; G-output of separated water; D-for safety valve; E-drainage; F-coupling of the pressure gauge; I-couplings for level indicator; K-fitting inspection
Continuous blow separator cyclone type designed to separate the boiler blowdown water into steam and water formed from the blowdown water of steam boilers when its pressure is reduced from intra-boiler pressure to the pressure in the separator and for the purpose of subsequent use of the heat of water and steam. Separation occurs due to the action of centrifugal forces caused by the tangential input of water into the separator. After this, steam is supplied to the consumer high degree dryness
Separators can be used in condensate systems to reduce the consumption of steam consumed and heat losses from the removed steam-condensate mixture.
In addition to the tangential supply of condensate (blowdown water), the separators are equipped with vertical louvered drop eliminators for drying the secondary boiling steam.
The separator is used in circuits with an atmospheric deaerator ( overpressure in the deaerator 0.02 MPa)
Name and symbol separator:
SNP -0.15-0.06 is a continuous blowing separator with a capacity of -0.15 m3 and a working pressure of 0.06 MPa.
Main parameters and technical characteristics
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Name |
SNP-0.15-0.6 (Du-300) |
(Du-450) |
SNP-0.7-0.7 (Du-600) |
SNP-1.4-0.7 (Du-800) |
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Working pressure |
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Design and principle of operation
The separator is a vertical cylindrical vessel (see Fig. 1) with flat or elliptical bottoms, a flattened inlet pipe or a circular pipe, steam and water outlet pipes and a float regulator that automatically maintains the water level. The flow is swirled through the organized supply of a steam-water mixture to the inner wall of the separator or through the installation of internal guide devices. Typically, the blowdown water consumption for the separator ranges from 1% to 5% of the boiler output.
Separation into steam and water occurs in the middle part of the separator. The steam, while maintaining rotational motion, is directed into the steam space and discharged through a pipe located on the upper bottom. Water flows down the inner surface of the separator into the water volume and is discharged through a pipe located in the lower part of the housing. A fitting is provided on the lower bottom for draining water from the separator when it is turned off and for periodically cleaning the lower part of the water volume from sludge and contaminants.
Rice. 1. Continuous blowing separator
A – supply of purge water; B – removal of separated steam; B – drainage; G – removal of separated water.
1 – gate valve for separated water outlet; 2 – water level regulator; 3 – nozzle for the inlet of the purge steam-water mixture; 4 – supports; 5 – pipe for steam outlet; 6 – upper and lower bottom; 7 – separator body; 8 – water level indicator; 9 – valve for drainage.
On the cylindrical part of the body, two supports 4 are welded for installing the separator and a nozzle 3 for the tangential supply of the steam-water mixture of boiler purge water to the separator. In the upper bottom of the separator there is a pipe with a flange 5 for the outlet of separated steam, and in the lower bottom there is a fitting with a valve 9 for draining water from the separator when it is turned off and for the possibility of periodically removing sludge and contaminants from the lower part of the water volume.
In the lower cylindrical part of the housing there is a float regulator for the water level in the separator 2 and a level indicator 8. Using the level indicator, the water level is visually monitored. The float level regulator is designed for automatic maintenance constant water level in the separator.
The operation diagram of the float level regulator is shown in Fig. 2. The upper position of the float can be fixed by turning the lock handle at an angle of 30 degrees.
Fig.2. Scheme of operation of the float level regulator
The nozzle supplying purge water to the separator has a flattened cross-section at the outlet, which enhances the centrifugal effect by obtaining a pre-stratified flow of the steam-water mixture. The primary separation of the steam-water mixture begins outside the separator, in the supply pipeline low pressure(see Fig. 3), made of the same diameter as the nozzle. The separation of the steam-water mixture into steam and water, which began in the supply pipeline, ends in the separator.
Rice. 3. Connection diagram of the separator to the continuous blowdown of boilers.
1 – input of continuous boiler blowdown; 2 – pipelines high pressure; 3 – boiler blowing control unit; 4 – limit washers; 5 – shut-off valve; 6 – low pressure supply pipeline; 7 – supply pipe (nozzle); 8 – steam output; 9 – drainage; 10 – output of separated water.
The steam is directed into the steam space, and the separated water flows down the inner wall of the separator into the water volume.
Installation procedure
The separator is installed in accordance with the technical documentation developed by specialized design organizations and the requirements of the installation instructions.
The connection of the continuous blowing separator to the steam boiler room circuit should be performed in accordance with the diagram shown in Fig. 4.
Rice. 4. Connection diagram of the separator to the steam boiler house circuit.
1 – steam boiler; 2 – continuous blowing separator; 3 – water-to-water heat exchanger; 4 – chemical water treatment filter; 5 – raw water supply; 6 – tank; 7 – deaerator.
To prevent a possible increase in pressure in the separator, it is necessary to install a water seal on the outlet pipeline near the separator to the shut-off valve. Do not install shut-off valves on the steam outlet line from the separator to the deaerator.
The separator is installed in a vertical position on pre-assembled support beams. Next, control and measuring instruments are installed, safety devices, float level regulator and piping is carried out.
The installation of the separator must provide the possibility of inspection, repair and cleaning from both the inside and outside, and must eliminate the danger of it tipping over. Hanging of the separator on the connecting pipelines is not allowed.
During installation, for ease of maintenance of the separator, platforms and stairs can be installed, which should not interfere with the strength, stability and possibility of free inspection and cleaning of the outer surface.
After installing and fastening the separator, piping it and equipping it with fittings, it is necessary to perform a hydraulic (pneumatic) test. After the hydraulic test, the separator and pipelines are washed, the functionality of the fittings, float level regulator, and safety valve is checked, after which the separator is put into operation.
Maintenance and Operation
The condition for normal and reliable operation of the separator is to ensure continuous removal of steam and water from the separator and maintain the pressure in the separator within the established limits. This is achieved if the float level regulator and water seal are in good condition.
The separator must be under constant supervision service personnel. The proper condition of the level regulator should be properly monitored:
- once a shift, check the mobility of the float and associated parts by turning the drain valve lock handle;
- Monitor steam pressure at least 3 times per shift;
- at least 3 times per shift, monitor the presence of a normal level of condensate in the housing according to water indicator glass.
- Purge the level indicator at least once per shift, depending on the quality of the purge water.
Reliable operation of the water seal must be ensured by the design and compliance with the requirements of the instructions for its maintenance.
When the separator is completely disconnected from the purge lines, in order to prevent a possible connection of the deaerator with the atmosphere through the separator in this case, the level control valve and the gate valve at the water outlet from the separator should be completely closed.
Periodic inspection of the separator should be carried out both for preventive purposes and to identify the causes of problems that have arisen.
Inspection and cleaning of the separator body must be carried out at least once every 2-3 years when the separator is shut down for routine and major repairs.
Continuous blowing separators must undergo technical inspection after installation, before putting into operation, periodically during operation and during necessary cases extraordinary examination.
In case of long-term repairs, as well as insufficient density of the shut-off valves, the equipment being repaired should be switched off. The thickness of the plugs must correspond to the parameters of the working environment.
When loosening the bolts flange connections Care must be taken to ensure that steam and water inside the separator and pipelines do not cause burns to people.
Price: 52,000 rub.
Boiler separation device (boiler separation devices)
The purpose of steam boilers is to produce steam and its further use.
One of the devices that is used to separate a steam-water mixture into steam and water,
is .
If we think of it geometrically, then the mixture input can be represented tangentially.
Thus, steam separation occurs due to centripetal (centrifugal) forces.
Nozzle at the inlet separator flattened, which enhances the centrifugal effect of separating the steam-water mixture.
Steam boiler separator (expander)
The steam, while maintaining rotational motion, is directed into the steam space and discharged through the pipe. Water flows down the inner wall separator into the water volume.
The float level control automatically maintains separator water level, which is visually determined by the level indicator.
Continuous blowdown expander
The float can be locked in the upper position by turning the locking handle 30°
To buy continuous blowing separator DN 300, click “submit a request” or call.
Boiler drum separation device
The separator kit includes:
- the separator itself;
- float level regulator;
- locking device with glass;
- 2 valves
Installation and installation of continuous blowing separator Du-300
Boiler blowdown expander
1. The separator is installed in a vertical position on pre-assembled support beams.
2. After installing the separator on the supports, instrumentation, safety devices, a float level regulator are installed, and piping is carried out.
3. The installation of the separator must provide the possibility of inspecting, repairing and cleaning it both from the inside and outside, and must eliminate the danger of it tipping over. Hanging of the separator on the connecting pipelines is not allowed.
4. During installation, for ease of maintenance of the separator, platforms and stairs can be installed, which should not interfere with the strength, stability and possibility of free inspection and cleaning of the outer surface. Welding them to the apparatus must be carried out according to the design in accordance with the “Rules for the Design and safe operation vessels operating under pressure."
5. After installing and fastening the separator, piping it and equipping it with fittings, it is necessary to carry out a hydraulic (pneumatic) test.
6. After the hydraulic test, the separator and pipelines are washed, the functionality of the fittings, float level regulator, and safety valve is checked, after which the separator is put into operation.
Steam boiler separation devices
Operating procedure and startup of the continuous blowing separator Du-300
Schematic diagram separator operation
Purge separator (expander)
After making sure that the pipelines, fittings and instrumentation are in good condition, proceed to putting the separator into operation, for which you must:
— smoothly open valves 1 (Fig. 29), fill the continuous blowdown separator with the mixture from the boiler blowdown valve;
— open valve 4 for drainage and valve 2 for the outlet of separated steam;
— close valve 4 and monitor the water level using the water indicator glass;
— when the normal water level is reached, smoothly open valve 3 of the separated water outlet, which is used to regulate the process of separation of the steam-water mixture and establish a constant water level in the lower part of the housing.
After starting the separator, when a pressure corresponding to the technical specifications, the separator is considered to be in normal operation.
Maintenance of continuous blowing separator Du-300
The separator must be under constant supervision of maintenance personnel.
To ensure uninterrupted operation of the separator, it is necessary to carry out the following checks at least 3 times per shift:
- steam pressure;
— for the presence of a normal level of condensate in the housing on the water indicator glass ( normal operation condensate control systems in the housing).
It is necessary to periodically blow out the water indicator glasses.
Periodic inspection of the separator should be carried out both for preventive purposes and to identify the causes of problems that have arisen.
Inspection and cleaning of the separator body must be carried out at least once every 2-3 years when the separator is shut down for routine and major repairs.
Continuous blowing separators must undergo technical inspection after installation, before putting into operation, periodically during operation and, if necessary, extraordinary inspection.
In case of long-term repairs, as well as insufficient density of the shut-off valves, the equipment being repaired should be switched off. The thickness of the plugs must correspond to the parameters of the working environment.
When loosening bolts on flange connections, care must be taken to ensure that steam and water inside the separator and piping do not cause burns to people.
Continuous blow separatorcyclone type is designed to separate the boiler blowdown water into steam and water formed from the blowdown water of steam boilers when its pressure is reduced from intra-boiler pressure to the pressure in the separator and for the purpose of subsequent use of the heat of water and steam. Separation occurs due to the action of centrifugal forces caused by the tangential input of water into the separator. After this, steam with a high degree of dryness is supplied to the consumer.
| Continuous separator purging SNP-0,15-1,4 |
Continuous blowing separators SNP can be used in condensate collection systems in order to reduce the consumption of steam consumed and heat losses from the discharged steam-condensate mixture.
In addition to the tangential supply of condensate (blowdown water), the blowdown separators are equipped with vertical louvered drop eliminators for drying the secondary boiling steam.
Main parameters and technical characteristics
| Name | Unit change |
SNP-0.15-0.06 (Du-300) |
SNP-0.15-0.8 (Du-300) |
SNP-0.15-1.4 (Du-300) |
SP-0.28-0.45 (Du-450) |
SP-0.7-0.6 (Du-600) |
SP-1.4-0.8 (Du-800) |
SP-1.5-0.8 (Du-800) |
SP-5.5-1.4 (Du-800) |
| Working pressure | MPa | 0,06 | 0,8 | 1,4 | 0,45 | 0,6 | 0,8 | 0,8 | 1,4 |
| Temperature | o C | 113 | 174,5 | 194 | 170 | 170 | 170 | 175 | 127 |
| Test pressure | MPa | 0,16 | 1,0 | 1,75 | 1,0 | 1,0 | 1,0 | 1,1 | 0,2 |
| Steam capacity | t/h | 1 | 1 | 1 | 0,7 | 2,75 | 5,26 | 12,5 | 70,0 |
| Capacity | m 3 | 0,15 | 0,15 | 0,15 | 0,28 | 0,7 | 1,4 | 1,5 | 5,5 |
| Dry weight without components | kg | 175 | 175 | 245 | 470 | 756 | 1114 | 1200 | 1878 |
| Weight of components | kg | 85 | 85 | 90 | 110 | 120 | 128 | 128 | 150 |
Design and principle of operation
The continuous blowing separator is a vertical cylindrical vessel (see Fig. 1) with elliptical bottoms, oppositely placed inlet pipes, steam and water outlet pipes, a level indicator for visual control, a spring safety valve, and a float steam trap that automatically maintains the water level. The swirling of the flow is carried out due to the organized supply of the steam-water mixture to the inner wall of the separator with the installation of internal guide devices. Typically, the blowdown water consumption for the separator ranges from 1% to 5% of the boiler output.
Separation into steam and water occurs in the middle part of the separator. The steam, while maintaining rotational motion, is directed into the steam space and discharged through a pipe located on the upper bottom. Water flows down the inner surface of the separator into the water volume and is discharged through a pipe located in the lower part of the housing. A fitting is provided on the lower bottom for draining water from the separator when it is turned off and for periodically cleaning the lower part of the water volume from sludge and contaminants.
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| Rice. 1. Drawing of a continuous blowing separator |
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| Rice. 2. Piping diagram of the continuous blowing separator |
On the cylindrical part of the body of the continuous blowdown separator, two supports are welded for installing the separator and nozzles for the tangential supply of the steam-water mixture of boiler blowdown water to the separator. In the upper bottom of the separator there is a pipe with a flange for the outlet of separated steam, and in the lower bottom there is a fitting with a valve for draining water from the separator when it is turned off and for the possibility of periodically removing sludge and contaminants from the lower part of the water volume.
The lower cylindrical part of the housing has a float-type condensate drain and a level indicator. Using the level indicator, the water level is visually monitored. The float-type condensate trap is designed to automatically maintain a constant water level in the separator.
The steam is directed into the steam space, and the separated water flows down the inner wall of the separator into the water volume.
Installation procedure
Installation of the purge separator is carried out in accordance with the technical documentation developed by specialized design organizations and the requirements of the installation instructions.
To prevent a possible increase in pressure, a spring safety valve is provided on the separator body.
The continuous blowing separator is installed in a vertical position on pre-assembled support beams. Next, instrumentation, safety devices, a float condensate trap are installed and piping is carried out.
The installation of the SNP purge separator must provide the possibility of inspecting, repairing and cleaning it from both the internal and external sides, and must eliminate the danger of it tipping over. Hanging of the separator on the connecting pipelines is not allowed.
During installation, for ease of maintenance of the separator, platforms and stairs can be installed, which should not interfere with the strength, stability and possibility of free inspection and cleaning of the outer surface.
After installing and securing the continuous blowing separator, piping and equipping it with fittings, it is necessary to perform a hydraulic (pneumatic) test. After the hydraulic test, the separator and pipelines are washed, the functionality of the fittings, float steam trap, and safety valve is checked, after which the separator is put into operation.
Maintenance and Operation
The condition for normal and reliable operation of a continuous blowdown separator is to ensure continuous removal of steam and water from the separator and maintain the pressure in the separator within the established limits. This is achieved if the float steam trap and safety valve are in good condition.
The continuous blowdown separator must be under constant supervision by operating personnel. The proper condition of the float steam trap should be properly monitored:
- check the sight glass, which must be installed behind the condensate drain, once per shift;
- Monitor steam pressure at least 3 times per shift;
- at least 3 times per shift, monitor the presence of a normal level of condensate in the housing using the water indicator glass;
- Purge the level indicator at least once per shift, depending on the quality of the purge water.
The safety valve must be forcibly undermined at least once per shift, followed by monitoring of the return of the valve to its original position and the absence of steam leaks. Periodic inspection of the separator should be carried out both for preventive purposes and to identify the causes of problems that have arisen.
Inspection and cleaning of the blowdown separator housing should be carried out at least once every 2-3 years when the separator is shut down for routine and major repairs.
Continuous blowing separators must undergo technical inspection after installation, before putting into operation, periodically during operation and, if necessary, extraordinary inspection.
In case of long-term repairs, as well as insufficient density of the shut-off valves, the equipment being repaired should be switched off. The thickness of the plugs must correspond to the parameters of the working environment.
When loosening bolts on flange connections, care must be taken to ensure that steam and water inside the purge separator and piping do not cause burns to people.