CN210088823U - Efficient low pressure feed water heater drainage system - Google Patents
Efficient low pressure feed water heater drainage system Download PDFInfo
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- CN210088823U CN210088823U CN201920186886.1U CN201920186886U CN210088823U CN 210088823 U CN210088823 U CN 210088823U CN 201920186886 U CN201920186886 U CN 201920186886U CN 210088823 U CN210088823 U CN 210088823U
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Abstract
The utility model relates to a high-efficiency drainage system of a low-pressure heater, which comprises a low-pressure cylinder, a seven-stage low-pressure heater, an eight-stage low-pressure heater, a condenser, a five-stage low-pressure heater, a six-stage low-pressure heater, a first condensate pump, a second condensate pump and the like; the drainage of each low-pressure heater realizes the step-by-step self-flow by means of pressure difference, the potential of drainage energy of each low-pressure heater is excavated, and heat exchange is fully carried out; connecting the normal drainage and emergency drainage of the eighth low-pressure heater and the emergency drainage of the fifth low-pressure heater, the sixth low-pressure heater and the seventh low-pressure heater to a main condensate water pipeline in front of an electric valve at the inlet of the first condensate water pump and the second condensate water pump, and realizing the control of the water level of each heater through the suction effect of the condensate water pumps; meanwhile, after the drain of each low-pressure heater enters the main condensate pipeline, the drain of each low-pressure heater is subjected to sufficient heat exchange with condensate of the condenser, the temperature of the condensate at the inlet of the condensate pump is increased, and the heat efficiency of the whole regenerative system is improved.
Description
Technical Field
The utility model relates to an efficient low pressure feed water heater drainage system belongs to the backheat system of steam turbine.
Background
In the drainage system of the existing low-pressure heater, for example, in a chinese patent with the application number of 201810768183.X, normal drainage of the low-pressure heater with higher pressure flows to the low-pressure heater with lower pressure by means of pressure difference in a step-by-step self-flow manner until the last low-pressure heater, the normal drainage enters a condenser, and after drainage of a heater with high flow rate enters the condenser, heat entering the condenser is increased; meanwhile, when the low-pressure heaters operate, if the normal drainage system is abnormal or the water level cannot be normally controlled, emergency drainage can be performed only by the emergency drainage system, and at the moment, the drainage parameters of the low-pressure heaters are higher, so that more drainage heat is brought into the condenser; the circulating water carries out the heat transfer cooling to the condenser, takes away the exhaust heat of low pressure jar and thermodynamic system's drainage heat, has increased the cold source loss of steam turbine, and the condenser vacuum also can appear corresponding reduction simultaneously, influences the economic nature of unit.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a reasonable in design's efficient low pressure heater drainage system.
The utility model provides a technical scheme that above-mentioned problem adopted is: a high-efficiency drainage system of a low-pressure heater is characterized by comprising a low-pressure cylinder, a seventh low-pressure heater, an eighth low-pressure heater, a condenser, a fifth low-pressure heater, a sixth low-pressure heater, a first condensate pump and a second condensate pump; the low-pressure cylinder is connected with the condenser, and the seventh low-pressure heater and the eighth low-pressure heater are fixed at the throat part of the condenser; the fifth low-pressure heater is connected with the sixth low-pressure heater, and a fifth normal drainage front stop valve, a fifth normal drainage pneumatic regulating valve and a fifth normal drainage rear stop valve are arranged on a normal drainage pipeline between the fifth low-pressure heater and the sixth low-pressure heater; the fifth low-pressure heater is also connected to a main condensate water pipeline in front of the first condensate pump and the second condensate pump, and a fifth emergency drain front stop valve, a fifth emergency drain pneumatic regulating valve and a fifth emergency drain rear stop valve are arranged on the emergency drain pipeline between the fifth low-pressure heater and the first condensate pump as well as the second condensate pump; the sixth low-pressure heater is connected with the seventh low-pressure heater, and a sixth normal drainage front stop valve, a sixth normal drainage pneumatic regulating valve and a sixth normal drainage rear stop valve are arranged on a normal drainage pipeline between the sixth low-pressure heater and the seventh low-pressure heater; the six low-pressure heater is also connected to a main condensate water pipeline in front of the first condensate pump and the second condensate pump, and a six emergency drain front stop valve, a six emergency drain pneumatic regulating valve and a six emergency drain rear stop valve are arranged on the emergency drain pipeline between the six low-pressure heater and the first condensate pump as well as the second condensate pump; the seven low-pressure heater is connected with the eight low-pressure heater, and a seven normal drainage front stop valve, a seven normal drainage pneumatic regulating valve and a seven normal drainage rear stop valve are arranged on a normal drainage pipeline between the seven low-pressure heater and the eight low-pressure heater; the seventh low-pressure heater is also connected to a main condensate water pipeline in front of the first condensate water pump and the second condensate water pump, and a seventh emergency drain front stop valve, a seventh emergency drain pneumatic regulating valve and a seventh emergency drain rear stop valve are arranged on the emergency drain pipeline between the seventh low-pressure heater and the first condensate water pump as well as the second condensate water pump; the eight low-pressure heater is connected to a main condensate pipeline in front of the first condensate pump and the second condensate pump, an eight normal drainage front stop valve, an eight normal drainage pneumatic regulating valve and an eight normal drainage rear stop valve are installed on a normal drain pipeline between the eight low-pressure heater and the first condensate pump and the second condensate pump, and an eight emergency drainage front stop valve, an eight emergency drainage pneumatic regulating valve and an eight emergency drainage rear stop valve are installed on an emergency drain pipeline between the eight low-pressure heater and the first condensate pump and the second condensate pump; a condensate pump and No. two condensate pumps all are connected to the hot well of condenser, and install an entry filter screen and an entry motorised valve on the pipeline between a condensate pump and condenser, install No. two entry filter screens and No. two entry motorised valves on the pipeline between No. two condensate pumps and condenser, install an export motorised valve and No. two export motorised valves respectively in the export of a condensate pump and No. two condensate pumps's export.
Further, the low pressure cylinder and the condenser are connected through an expansion joint in a welding mode.
Furthermore, No. seven low pressure feed water heater and No. eight low pressure feed water heater are the cylinder type structure, and all run through fixedly with the condenser.
Further, the No. five low-pressure heater and the No. six low-pressure heater are both cylindrical structures.
Furthermore, the seventh low-pressure heater, the eighth low-pressure heater, the fifth low-pressure heater and the sixth low-pressure heater are provided with drain cooling sections for fully absorbing the drain heat of the low-pressure heaters, improving the temperature of main condensed water and improving the efficiency of a heat regenerative system.
The using method comprises the following steps:
the water levels of the fifth low-pressure heater, the sixth low-pressure heater, the seventh low-pressure heater and the eighth low-pressure heater are respectively controlled by a fifth normal drainage pneumatic regulating valve, a sixth normal drainage pneumatic regulating valve, a seventh normal drainage pneumatic regulating valve and an eighth normal drainage pneumatic regulating valve, and when the valve on the normal drainage pipeline of the low-pressure heater is abnormal or the water level cannot be normally controlled, the water levels of the low-pressure heaters are respectively regulated and controlled by the fifth emergency drainage pneumatic regulating valve, the sixth emergency drainage pneumatic regulating valve, the seventh emergency drainage pneumatic regulating valve and the eighth emergency drainage pneumatic regulating valve, so that the water levels of the low-pressure heaters are kept normal.
The drainage modes of the fifth low-pressure heater, the sixth low-pressure heater, the seventh low-pressure heater and the eighth low-pressure heater comprise normal drainage and emergency drainage. The normal drainage and emergency drainage modes are provided with a pneumatic regulating valve, a front stop valve of the pneumatic regulating valve and a rear stop valve of the pneumatic regulating valve. The water level of each low-pressure heater is controlled by a normal drainage pneumatic regulating valve and an emergency drainage pneumatic regulating valve; the on-line maintenance and replacement of the pneumatic regulating valve are realized through the front stop valve and the rear stop valve of the pneumatic regulating valve.
The low pressure cylinder is located on the first operation layer, the exhaust steam of the medium pressure cylinder enters the low pressure cylinder to perform expansion work, and the exhaust steam is discharged into the condenser to be condensed; the condenser is connected with the lower end of the low-pressure cylinder through an expansion joint, and exhaust steam discharged into the condenser from the low-pressure cylinder is cooled through circulating water to ensure the vacuum of the condenser; after being condensed into water by the condenser, the exhaust steam is collected in the hot well, then enters the main condensate pipeline, flows through the inlet electric valves and the inlet filter screens of the first condensate pump and the second condensate pump, enters the first condensate pump and the second condensate pump, is pressurized, flows through the outlet electric valves of the first condensate pump and the second condensate pump, and enters the shaft seal heater and each low-pressure heater for heating.
No. five low pressure feed water heaters arrange on the oxygen-eliminating device layer, and the heater bottom is provided with hydrophobic cooling section, and bleed air gets into No. five low pressure feed water heaters heating main condensate water, becomes the condensate water after abundant heat transfer and collects to heater bottom casing, and normal drainage and the hydrophobic pipeline of emergency are welded respectively to No. five low pressure feed water heaters bottom casing. Condensed water flows to a sixth low-pressure heater through a normal drainage pipeline by means of pressure difference, the water level of a fifth low-pressure heater is controlled by a normal drainage pneumatic regulating valve, the opening of the pneumatic regulating valve is interlocked with the water level, when any valve on the normal drainage pipeline breaks down or the water level cannot be normally controlled, drainage of the fifth low-pressure heater is discharged through an emergency drainage pipeline, the water level is controlled by a fifth emergency drainage pneumatic regulating valve, and the opening of the regulating valve is interlocked with the water level, so that the dynamic adjustment of the water level is realized;
no. six low pressure feed water heaters arrange on the second operation layer, and the heater bottom is provided with hydrophobic cooling section, and bleed and get into No. six low pressure feed water heaters heating main condensate water, become the condensate water after abundant heat transfer and collect to heater bottom casing, and normal drainage and the hydrophobic pipeline of emergency are welded respectively to No. six low pressure feed water heaters bottom casing. Condensed water flows to a seventh low-pressure heater through a normal drainage pipeline by means of pressure difference, the water level of a sixth low-pressure heater is controlled by a normal drainage pneumatic regulating valve, the opening of the pneumatic regulating valve is interlocked with the water level, when any valve on the normal drainage pipeline breaks down or the water level cannot be normally controlled, drainage of the sixth low-pressure heater is discharged through an emergency drainage pipeline, the water level is controlled by a sixth emergency drainage pneumatic regulating valve, and the opening of the regulating valve is interlocked with the water level, so that the dynamic adjustment of the water level is realized;
air is pumped into a No. seven low-pressure heater to heat main condensation water, the main condensation water is changed into condensation water after sufficient heat exchange and is collected to a heater bottom shell, and a normal drainage pipeline and an emergency drainage pipeline are respectively welded on the No. seven low-pressure heater bottom shell. Condensed water flows to the eighth low-pressure heater through a normal drainage pipeline by means of pressure difference, the water level of the seventh low-pressure heater is controlled by a normal drainage pneumatic regulating valve, the opening of the pneumatic regulating valve is interlocked with the water level, when any valve on the normal drainage pipeline breaks down or the water level cannot be normally controlled, drainage of the seventh low-pressure heater is discharged through the emergency drainage pipeline, the water level is controlled by the seventh emergency drainage pneumatic regulating valve, and the opening of the regulating valve is interlocked with the water level, so that the dynamic adjustment of the water level is realized;
air is pumped into the eight low-pressure heater to heat main condensation water, the main condensation water is changed into condensation water after sufficient heat exchange and is collected to the bottom shell of the heater, and the bottom shell of the eight low-pressure heater is respectively welded with a normal drainage pipeline and an emergency drainage pipeline. The water level of the eighth low-pressure heater is controlled by a normal drainage pneumatic regulating valve, the opening of the pneumatic regulating valve is interlocked with the water level, when any valve on a normal drainage pipeline breaks down or the water level cannot be normally controlled, drainage of the eighth low-pressure heater is discharged through an emergency drainage pipeline, the water level is controlled by the eighth emergency drainage pneumatic regulating valve, and the opening of the regulating valve is interlocked with the water level to realize dynamic regulation of the water level;
compared with the prior art, the method has the following advantages and effects: the system has simple and reasonable structure, the drainage of the fifth low-pressure heater, the sixth low-pressure heater, the seventh low-pressure heater and the eighth low-pressure heater realizes the step-by-step self-flow by means of pressure difference, the potential of drainage energy of each low-pressure heater is excavated, and the heat exchange is fully carried out; connecting the normal drainage and emergency drainage of the eighth low-pressure heater and the emergency drainage of the fifth low-pressure heater, the sixth low-pressure heater and the seventh low-pressure heater to a main condensate water pipeline in front of an electric valve at the inlet of the first condensate water pump and the second condensate water pump, and realizing the control of the water level of each heater through the suction effect of the condensate water pumps; meanwhile, after the drain water of each low-pressure heater enters the main condensate water pipeline, the drain water of each low-pressure heater is subjected to full heat exchange with condensate water of a condenser, so that the temperature of the condensate water at the inlet of a condensate water pump is increased, and the heat efficiency of the whole regenerative system is improved; the emergency drainage and the normal drainage of each low-pressure heater are not connected to the condenser any more, so that the heat entering the condenser is reduced, the circulating water quantity required for maintaining the vacuum of the condenser is reduced, the capacity of the whole circulating water system and the cooling tower is reduced, the capital investment and the station power are reduced, and the effects of energy conservation and emission reduction are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a drainage system of a low-pressure heater in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1, the high-efficiency drainage system of the low-pressure heater in this embodiment includes a low-pressure cylinder 1, a seventh low-pressure heater 2, an eighth low-pressure heater 3, a condenser 4, a fifth low-pressure heater 5, a sixth low-pressure heater 6, a fifth normal drainage front stop valve 7, a fifth normal drainage pneumatic control valve 8, a fifth normal drainage rear stop valve 9, a sixth emergency drainage front stop valve 10, a sixth emergency drainage pneumatic control valve 11, a sixth emergency drainage rear stop valve 12, a fifth emergency drainage front stop valve 13, a fifth emergency drainage pneumatic control valve 14, a fifth emergency drainage rear stop valve 15, a sixth normal drainage front stop valve 16, a sixth normal drainage pneumatic control valve 17, a sixth normal drainage rear stop valve 18, a seventh emergency drainage front stop valve 19, a seventh emergency drainage pneumatic control valve 20, a seventh emergency drainage rear stop valve 21, a sixth normal drainage pneumatic control valve 17, a sixth normal drainage rear stop valve 18, a seventh emergency drainage front stop valve 19, a seventh emergency, Eight critical drainage front stop valves 22, eight critical drainage pneumatic regulating valves 23, eight critical drainage rear stop valves 24, eight normal drainage front stop valves 25, eight normal drainage pneumatic regulating valves 26, eight normal drainage rear stop valves 27, seven normal drainage front stop valves 28, seven normal drainage pneumatic regulating valves 29, seven normal drainage rear stop valves 30, a first inlet electric valve 31, a second inlet electric valve 32, a first inlet filter screen 33, a second inlet filter screen 34, a first condensate pump 35, a second condensate pump 36, a first outlet electric valve 37 and a second outlet electric valve 38.
The low-pressure cylinder 1 and the condenser 4 in this embodiment are connected by welding through an expansion joint.
No. seven low pressure feed water heater 2 and No. eight low pressure feed water heater 3 in this embodiment are the cylinder type structure, run through welded fastening at condenser 4 throat.
No. five low pressure feed water heater 5 in this embodiment is the cylinder type structure, and the casing bottom sets up hydrophobic cooling section, and the normal hydrophobic pipeline of outside welding of casing bottom carries out welded connection with stop valve 7 before No. five normal hydrophobic, No. five normal hydrophobic pneumatic control valve 8 and No. five normal hydrophobic back stop valve 9 in proper order, then is connected to the middle part of No. six low pressure feed water heater 6 casings.
The outside welding critical drainage pipeline of the bottom of No. 5 low pressure feed water heaters's of this embodiment, in proper order with No. five preceding stop valves 13 of critical drainage, No. five pneumatic governing valves 14 of critical drainage and No. five hydrophobic back stop valves 15 of critical drainage carry out welded connection, then be connected to on the main condensate water pipeline before the entry motorised valve of condensate pump 35 and No. two condensate pump 36.
No. six low pressure feed water heater 6 in this embodiment is the cylinder type structure, and the casing bottom sets up hydrophobic cooling section, and the outside welding of casing bottom is normal hydrophobic pipeline, carries out welded connection with No. six normal hydrophobic preceding stop valve 16, No. six normal hydrophobic pneumatic control valve 17 and No. six normal hydrophobic back stop valve 18 in proper order, then is connected to the middle part of No. seven low pressure feed water heater 2 casings.
In this embodiment, the critical drain pipe is welded to the outside of the bottom of the housing of the sixth low-pressure heater 6, and is welded to the pre-critical-drain stop valve 10, the pneumatic critical-drain regulating valve 11, and the post-critical-drain stop valve 12 in sequence, and then is connected to the main condensate pipe before the inlet electric valves of the first condensate pump 35 and the second condensate pump 36.
The bottom of the No. seven low-pressure heater 2 casing in this embodiment sets up hydrophobic cooling section, and the normal hydrophobic pipeline of outside welding of casing bottom carries out welded connection with No. seven normal hydrophobic preceding stop valve 28, No. seven normal hydrophobic pneumatic control valve 29 and No. seven normal hydrophobic back stop valve 30 in proper order, then is connected to the middle part of No. eight low-pressure heater 3 casings.
The outside welding critical pipeline of the bottom of No. seven low pressure feed water heater 2 casing in this embodiment carries out welded connection with No. seven critical drainage preceding stop valve 19, No. seven critical drainage pneumatic control valve 20 and No. seven critical drainage back stop valve 21 in proper order, then is connected to on the main condensate water pipeline before the entry motorised valve of condensate pump 35 and No. two condensate pump 36.
No. eight low pressure feed water heater 3 casing bottoms in this embodiment set up hydrophobic cooling section, and the normal hydrophobic pipeline of outside welding of casing bottom carries out welded connection with stop valve 25 before the normal hydrophobic of No. eight in proper order, the pneumatic governing valve 26 of the normal hydrophobic of No. eight and stop valve 27 after the normal hydrophobic of No. eight, then is connected to on the main condensate water pipeline before the entry motorised valve of condensate pump 35 and No. two condensate pumps 36.
The outside welding critical drainage pipeline of the bottom of No. eight low pressure feed water heater 3 casing in this embodiment carries out welded connection with No. eight critical drainage preceding stop valve 22, No. eight critical drainage pneumatic control valve 23 and No. eight critical drainage back stop valve 24 in proper order, then is connected to on the main condensate water pipeline before condensate pump 35 and No. two condensate pump 36's the entry motorised valve.
In this embodiment, the first condensate pump 35 is connected to the first inlet electric valve 31 and the first inlet filter screen 33 by welding through pipes, then connected to the hot well of the condenser 4, and then connected to the first outlet electric valve 37 by welding.
In this embodiment, the second condensate pump 36 is connected to the second inlet electric valve 32 and the second inlet filter screen 34 by welding via pipes, and then connected to the hot well of the condenser 4, and then connected to the second outlet electric valve 38 by welding. The outlet pipes of the first condensate pump 35 and the second condensate pump 36 are collected to a main pipe.
The field assembly method and the use method of the drainage system of the low-pressure heater in the embodiment comprise the following steps:
the first step is as follows: the low pressure cylinder 1, the condenser 4, the first condensate pump 35, the second condensate pump 36, the fifth low pressure heater 5 and the sixth low pressure heater 6 are all transported to the site and fixed with the foundation; the seventh low-pressure heater 2 and the eighth low-pressure heater 3 are transversely arranged at the throat part of the condenser 4 and are welded and fixed;
secondly, welding and fixing the low-pressure cylinder 1 and the condenser 4 through an expansion joint;
thirdly, the outer part of the bottom of the shell of the fifth low-pressure heater 5 is welded with a normal drainage pipeline, a fifth normal drainage front stop valve 7, a fifth normal drainage pneumatic regulating valve 8 and a fifth normal drainage rear stop valve 9, and then is welded and connected to the middle part of the shell of the sixth low-pressure heater 6;
fourthly, the outside of the bottom of the shell of the fifth low-pressure heater 5 is welded with the emergency drain pipeline, the fifth emergency drain front stop valve 13, the fifth emergency drain pneumatic regulating valve 14 and the fifth emergency drain rear stop valve 15, and then the fifth emergency drain pneumatic regulating valve is welded and connected to the condensed water pipeline between the condenser 4 and the first inlet electric valve 31 and the second inlet electric valve 32;
fifthly, welding the outer part of the bottom of the shell of the No. six low-pressure heater 6 with a normal drainage pipeline, a No. six normal drainage front stop valve 16, a No. six normal drainage pneumatic regulating valve 17 and a No. six normal drainage rear stop valve 18, and then welding the outer part of the bottom of the shell of the No. six low-pressure heater to the middle part of the shell of the No. seven low-pressure heater 2;
sixthly, the outside of the bottom of the shell of the No. six low-pressure heater 6 is welded with an emergency drain pipeline, a No. six emergency drain front stop valve 10, a No. six emergency drain pneumatic regulating valve 11 and a No. six emergency drain rear stop valve 12, and then the parts are welded and connected to a condensed water pipeline between the condenser 4 and the first inlet electric valve 31 and the second inlet electric valve 32;
seventhly, welding the outer part of the bottom of the shell of the No. seven low-pressure heater 2 with a normal drainage pipeline, a No. seven normal drainage front stop valve 28, a No. seven normal drainage pneumatic regulating valve 29 and a No. seven normal drainage rear stop valve 30, and then welding the outer part of the bottom of the shell of the No. eight low-pressure heater 3 to the middle part of the shell of the No. eight low-pressure heater;
eighthly, welding the outer part of the bottom of the shell of the No. seven low-pressure heater 2 with an emergency drain pipeline, a No. seven emergency drain front stop valve 19, a No. seven emergency drain pneumatic regulating valve 20 and a No. seven emergency drain rear stop valve 21, and then welding the outer part of the shell of the No. seven low-pressure heater with the condensate pipeline between the condenser 4 and the first inlet electric valve 31 and the second inlet electric valve 32;
ninth, the outside of the bottom of the shell of the eighth low-pressure heater 3 is welded with a normal drainage pipeline, an eighth normal drainage front stop valve 25, an eighth normal drainage pneumatic regulating valve 26 and an eighth normal drainage rear stop valve 27, and then is welded and connected to a condensed water pipeline between the condenser 4 and the first inlet electric valve 31 and the second inlet electric valve 32;
tenth step, the outside of the bottom of the housing of the eighth low-pressure heater 3 is welded with the emergency drain pipeline, the emergency drain front stop valve 22, the emergency drain pneumatic regulating valve 23 and the emergency drain rear stop valve 24, and then is welded and connected to the condensed water pipeline between the condenser 4 and the first inlet electric valve 31 and the second inlet electric valve 32;
step eleven, welding and connecting a first condensate pump 35, a first inlet electric valve 31, a first outlet electric valve 37, a first inlet filter screen 33 and a pipeline;
step ten, a second condensate pump 36 is welded with a second inlet electric valve 32, a second outlet electric valve 38, a second inlet filter screen 34 and a pipeline, and then is welded with a pipeline behind a first outlet electric valve 37 to form a main pipe;
thirteenth, the water levels of the fifth low-pressure heater 5, the sixth low-pressure heater 6, the seventh low-pressure heater 2 and the eighth low-pressure heater 3 are respectively controlled by a fifth normal drainage pneumatic control valve 8, a sixth normal drainage pneumatic control valve 17, a seventh normal drainage pneumatic control valve 29 and an eighth normal drainage pneumatic control valve 26, and when the valves on the normal drainage pipelines of the low-pressure heaters are abnormal or the water levels cannot be normally controlled, the water levels of the low-pressure heaters are respectively regulated and controlled by a fifth emergency drainage pneumatic control valve 14, a sixth emergency drainage pneumatic control valve 11, a seventh emergency drainage pneumatic control valve 20 and an eighth emergency drainage pneumatic control valve 23, so that the water levels of the low-pressure heaters are kept normal.
Although the present invention has been described with reference to the above embodiments, it should not be construed as being limited to the scope of the present invention, and any modifications and alterations made by those skilled in the art without departing from the spirit and scope of the present invention should fall within the scope of the present invention.
Claims (5)
1. A high-efficiency drainage system of a low-pressure heater is characterized by comprising a low-pressure cylinder (1), a seventh low-pressure heater (2), an eighth low-pressure heater (3), a condenser (4), a fifth low-pressure heater (5), a sixth low-pressure heater (6), a first condensate pump (35) and a second condensate pump (36); the low-pressure cylinder (1) is connected with the condenser (4), and the seventh low-pressure heater (2) and the eighth low-pressure heater (3) are fixed at the throat part of the condenser (4); the fifth low-pressure heater (5) is connected with the sixth low-pressure heater (6), and a fifth normal drainage front stop valve (7), a fifth normal drainage pneumatic regulating valve (8) and a fifth normal drainage rear stop valve (9) are arranged on a normal drainage pipeline between the fifth low-pressure heater (5) and the sixth low-pressure heater (6); the fifth low-pressure heater (5) is also connected to a main condensate pipeline in front of the first condensate pump (35) and the second condensate pump (36), and a fifth emergency drain front stop valve (13), a fifth emergency drain pneumatic regulating valve (14) and a fifth emergency drain rear stop valve (15) are arranged on the emergency drain pipeline between the fifth low-pressure heater (5) and the first condensate pump (35) and the second condensate pump (36); the six low-pressure heater (6) is connected with the seven low-pressure heater (2), and a six normal drainage front stop valve (16), a six normal drainage pneumatic regulating valve (17) and a six normal drainage rear stop valve (18) are arranged on a normal drainage pipeline between the six low-pressure heater (6) and the seven low-pressure heater (2); the six low-pressure heater (6) is also connected to a main condensate pipeline in front of the first condensate pump (35) and the second condensate pump (36), and a six emergency drain front stop valve (10), a six emergency drain pneumatic regulating valve (11) and a six emergency drain rear stop valve (12) are mounted on an emergency drain pipeline between the six low-pressure heater (6) and the first condensate pump (35) and the second condensate pump (36); the seven low-pressure heater (2) is connected with the eight low-pressure heater (3), and a seven normal drainage front stop valve (28), a seven normal drainage pneumatic regulating valve (29) and a seven normal drainage rear stop valve (30) are arranged on a normal drainage pipeline between the seven low-pressure heater (2) and the eight low-pressure heater (3); the seven low-pressure heater (2) is also connected to a main condensate pipeline in front of the first condensate pump (35) and the second condensate pump (36), and a seven emergency drain front stop valve (19), a seven emergency drain pneumatic regulating valve (20) and a seven emergency drain rear stop valve (21) are arranged on the emergency drain pipeline between the seven low-pressure heater (2) and the first condensate pump (35) and the second condensate pump (36); the system is characterized in that the eighth low-pressure heater (3) is connected to a main condensate pipeline in front of the first condensate pump (35) and the second condensate pump (36), an eighth normal drainage front stop valve (25), an eighth normal drainage pneumatic regulating valve (26) and an eighth normal drainage rear stop valve (27) are arranged on a normal drain pipeline between the eighth low-pressure heater (3) and the first condensate pump (35) and the second condensate pump (36), and an eighth emergency drainage front stop valve (22), an eighth emergency drainage pneumatic regulating valve (23) and an eighth emergency drainage rear stop valve (24) are arranged on an emergency drain pipeline between the eighth low-pressure heater (3) and the first condensate pump (35) and the second condensate pump (36); a condensate pump (35) and No. two condensate pumps (36) all are connected to the hot well of condenser (4), and install an entry filter screen (33) and entry motorised valve (31) on the pipeline between a condensate pump (35) and condenser (4), install No. two entry filter screens (34) and No. two entry motorised valves (32) on the pipeline between No. two condensate pumps (36) and condenser (4), install export motorised valve (37) and No. two export motorised valves (38) respectively in the export of a condensate pump (35) and the export of No. two condensate pumps (36).
2. The high efficiency drain system for a low pressure heater according to claim 1, wherein the low pressure cylinder (1) is connected to the condenser (4) by welding via an expansion joint.
3. The high-efficiency drain system of the low-pressure heater as claimed in claim 1, wherein the No. seven low-pressure heater (2) and the No. eight low-pressure heater (3) are both of cylindrical structures and are both fixed with the condenser (4) in a penetrating manner.
4. The high efficiency low pressure heater drain system according to claim 1, wherein the number five low pressure heater (5) and the number six low pressure heater (6) are both cylindrical structures.
5. The high-efficiency drain system of the low-pressure heater according to claim 1, wherein the seven low-pressure heater (2), the eight low-pressure heater (3), the five low-pressure heater (5) and the six low-pressure heater (6) are provided with drain cooling sections for fully absorbing the heat of draining the low-pressure heaters, increasing the temperature of main condensed water and improving the efficiency of a regenerative system.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920186886.1U CN210088823U (en) | 2019-02-02 | 2019-02-02 | Efficient low pressure feed water heater drainage system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920186886.1U CN210088823U (en) | 2019-02-02 | 2019-02-02 | Efficient low pressure feed water heater drainage system |
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| CN210088823U true CN210088823U (en) | 2020-02-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
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2019
- 2019-02-02 CN CN201920186886.1U patent/CN210088823U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109855082A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of efficient low-pressure heater draining system and its application method |
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