CN110872959A - Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system - Google Patents
Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system Download PDFInfo
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- CN110872959A CN110872959A CN201911281956.2A CN201911281956A CN110872959A CN 110872959 A CN110872959 A CN 110872959A CN 201911281956 A CN201911281956 A CN 201911281956A CN 110872959 A CN110872959 A CN 110872959A
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- 230000008878 coupling Effects 0.000 title claims abstract description 15
- 238000010168 coupling process Methods 0.000 title claims abstract description 15
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 88
- 239000000779 smoke Substances 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 12
- 238000007789 sealing Methods 0.000 claims abstract description 9
- 238000001816 cooling Methods 0.000 claims description 22
- 238000010438 heat treatment Methods 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 239000002918 waste heat Substances 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 6
- 238000000605 extraction Methods 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000003657 drainage water Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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Abstract
The invention discloses a coupling system for zero-output heat supply of a low-pressure economizer and a low-pressure cylinder, which comprises a medium-pressure cylinder, a sealing valve, a low-pressure cylinder, a low-temperature heat supply network circulating water pipe, the low-pressure economizer, a heat supply network heater and a heat supply network drainage pump, wherein the medium-pressure cylinder is connected with the sealing valve; the sealing valve is arranged on a middle-low pressure communicating pipe between the outlet of the middle pressure cylinder and the inlet of the low pressure cylinder; a low-temperature heat supply network circulating water pipe is connected to the inlet at the pipe side of the heat supply network heater; the water side inlet of the low-pressure economizer is communicated with a low-temperature heat supply network circulating water pipe, and a water outlet pipeline of the low-pressure economizer is communicated with a water outlet pipeline of a heat supply network drainage pump; the outlet of the heat-supply network drain pump is divided into two paths, one path is connected with a deaerator, and the other path is connected with a hot well of a condenser; the smoke side inlet of the low-pressure economizer is connected with the smoke exhaust pipeline of the outlet of the air preheater, and the smoke side outlet of the low-pressure economizer is connected with the inlet of the electric dust collector. The invention enables the low-pressure economizer system to be normally put into operation when the subcritical heat supply unit low-pressure cylinder is in zero-output heat supply operation, can recover the waste heat of the exhaust smoke, reduces the exhaust smoke temperature, improves the efficiency of the electric dust remover, and improves the energy-saving and environment-friendly indexes of the unit.
Description
[ technical field ] A method for producing a semiconductor device
The invention belongs to the technical field of thermal power generation, and relates to a zero-output heat supply coupling system of a low-pressure economizer and a low-pressure cylinder.
[ background of the invention ]
In recent years, a low-pressure cylinder zero-output technology, also called a low-pressure cylinder steam-inlet cutting and heat supplying technology, is popularized and applied to a plurality of cogeneration units. The technology is a great breakthrough to the traditional operation mode of the steam turbine, the most of the steam entering the original low-pressure cylinder is used for heat supply in the heat supply period in winter, the low-pressure cylinder has extremely small flow steam, and the heat supply capacity of the unit is improved; if the external heat supply load is not changed, the generating power of the unit can be greatly reduced, and deep peak regulation is realized; almost no cold source loss exists during the heat supply period of the unit, and the coal consumption of the unit for generating electricity is greatly reduced.
The low-pressure economizer system, also known as a low-temperature economizer system and a flue gas waste heat recovery system, is an energy-saving technology commonly used by the existing thermal power generating units. The heat exchanger is additionally arranged on the flue gas pipeline between the air preheater and the electric dust remover, the heat of exhausted smoke of the boiler is recovered to heat low-pressure condensed water of a turbine regenerative system, the steam extraction amount of the low-pressure heater is reduced, and further the output of a turbine is increased. And the flue gas temperature is reduced and then enters the electric dust collector, the volume flow is reduced, the specific resistance of the fly ash is obviously reduced, and the electric dust collection efficiency is improved.
Under the zero-output heat supply operating condition of the low-pressure cylinder, most of the steam discharged by the medium-pressure cylinder enters the heat supply network heater, then drained water can directly flow into the deaerator, and only a small amount of cooling steam passes through the low-pressure cylinder, so that the heat load of the condenser is very small, and the amount of condensed water is also very small. For a subcritical heat supply unit provided with a low-pressure economizer system, if the amount of condensed water is small, the low-pressure economizer system cannot be normally put into operation, and adverse effects are caused on the energy-saving and environment-friendly operation of the unit and the service life of the low-pressure economizer.
[ summary of the invention ]
The invention aims to solve the problem that the low-pressure economizer system cannot be normally put into operation when the amount of condensed water is small in the subcritical heat supply unit provided with the low-pressure economizer system, and provides a zero-output heat supply coupling system of a low-pressure economizer and a low-pressure cylinder.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
a coupling system of a low-pressure economizer and a low-pressure cylinder for zero-output heat supply comprises:
the middle pressure cylinder and the low pressure cylinder are connected through a middle and low pressure cylinder communicating pipe, and a cooling steam system is connected in parallel on the middle and low pressure cylinder communicating pipe; the steam outlet end of the intermediate pressure cylinder is connected with the shell side inlet of the heating network heater, and the steam outlet end of the low pressure cylinder is connected with the inlet of the condenser;
the shell side outlet of the heat supply network heater is connected with a heat supply network drainage pump, the outlet of the heat supply network drainage pump is divided into two paths, one path is connected with a deaerator, and the other path is connected with a condenser hot well; the inlet at the tube side of the heating network heater is connected with a low-temperature heating network circulating water pipe, and the outlet at the tube side is connected with a high-temperature heating network circulating water pipe; two ends of a pipe side inlet and a pipe side outlet of the heat supply network heater are connected with a low-pressure economizer in parallel; and
the inlet water pipe of the low-pressure economizer is communicated with the low-temperature heat supply network circulating water pipe, and the outlet water pipe of the low-pressure economizer is communicated with the high-temperature heat supply network circulating water pipe; the smoke side inlet of the low-pressure economizer is communicated with the smoke exhaust pipeline of the outlet of the air preheater, and the smoke side outlet of the low-pressure economizer is communicated with the smoke pipeline of the inlet of the electric dust collector.
The invention further improves the following steps:
a sealing valve is arranged on the middle and low pressure cylinder communicating pipe; the cooling steam system comprises a cooling steam pipeline connected with the middle-low pressure cylinder communicating pipe in parallel, and the cooling steam pipeline is provided with a regulating valve and a flow orifice plate.
The inlet water pipe is provided with a first connecting door and a booster pump; the inlet of the first connecting door is communicated with the low-temperature heat supply network circulating water pipe, the outlet of the first connecting door is connected with the inlet of the booster pump, and the outlet of the booster pump is connected with the inlet of the low-pressure economizer.
And a second connecting door is arranged on the outlet water pipe, and the outlet of the second connecting door is communicated with the high-temperature heat supply network circulating water pipe.
The inlet water pipe and the outlet water pipe are connected through a third connecting door.
And a fourth connecting door is arranged on a condenser inlet drain pipe between the heat supply network drain pump and the condenser.
Compared with the prior art, the invention has the following beneficial effects:
in the heat supply period, the steam inlet of the communicating pipe of the medium-low pressure cylinder is cut off, a small amount of cooling steam is introduced into a newly-added bypass pipeline and is used for taking away blast heat generated by the rotation of the low-pressure rotor after the steam inlet of the low-pressure cylinder is cut off; in addition, the original low-pressure cylinder is used for supplying heat, so that the heat supply capacity of the unit is improved; under the condition of constant heat supply, the generating power of the unit can be reduced to a certain extent, and deep peak regulation is realized; and almost no cold source loss exists during the heat supply period of the unit, so that the coal consumption of the unit for generating electricity is greatly reduced. The system can realize the flexible switching of the heat supply unit between the steam extraction and condensation type operation mode and the high back pressure operation mode. On the other hand, the low-temperature heat supply network circulating water of the shunting part enters the low-pressure economizer, and returns to the high-temperature heat supply network circulating water pipe for heat supply after being heated, so that the normal operation of the low-pressure economizer system is ensured under the zero-output operation condition of the low-pressure cylinder of the unit, the waste heat of the discharged smoke is recovered, the temperature of the discharged smoke is reduced, the efficiency of the electric dust remover is improved, and the energy-saving and environment-friendly indexes of the. If the heat supply network circulating water pipeline is far away from the low-pressure economizer or the water quality of the heat supply network circulating water is unqualified and other reasons cannot lead the heat supply network circulating water into the low-pressure economizer, part of the drainage water at the outlet of the heat supply network drainage pump can be shunted and is converged into a condenser hot well for cooling through a drainage pipe at the inlet of a condenser, the low-pressure condensate quantity is increased, and the normal operation of the low-pressure economizer is ensured, but compared with the former operation mode, part of the drainage heat is lost, and the operation economy is relatively poor.
[ description of the drawings ]
Fig. 1 is a schematic view of the overall structure of the present invention.
Wherein, 1-a steam inlet pipeline of the intermediate pressure cylinder; 2-intermediate pressure cylinder; 3-middle and low pressure cylinder communicating pipe; 4-cooling the steam pipeline; 5-adjusting the valve; 6-flow orifice plate; 7-sealing valve of the communicating pipe of the medium and low pressure cylinder; 8-low pressure cylinder; 9-low pressure cylinder exhaust pipe; 10-a condenser; 11-a low-temperature heat supply network circulating water pipe; 12-a first contact gate; 13-a first communication conduit; 14-inlet water pipe of low-pressure economizer; 15-a third contact gate; 16-a booster pump; 17-outlet water pipe of low-pressure economizer; 18-inlet flue gas pipeline of electric dust collector; 19-low pressure economizer; 20-an air preheater outlet flue duct; 21-a heating network heater; 22-heat net drainage pump; 23-high temperature heat supply network circulating water pipe; 24-a deaerator; 25-a second interface; 26-a second connecting conduit; 27-a condenser inlet drain pipe; 28-a fourth contact gate; 29-heating steam extraction pipeline.
[ detailed description ] embodiments
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments, and are not intended to limit the scope of the present disclosure. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Various structural schematics according to the disclosed embodiments of the invention are shown in the drawings. The figures are not drawn to scale, wherein certain details are exaggerated and possibly omitted for clarity of presentation. The shapes of various regions, layers and their relative sizes and positional relationships shown in the drawings are merely exemplary, and deviations may occur in practice due to manufacturing tolerances or technical limitations, and a person skilled in the art may additionally design regions/layers having different shapes, sizes, relative positions, according to actual needs.
In the context of the present disclosure, when a layer/element is referred to as being "on" another layer/element, it can be directly on the other layer/element or intervening layers/elements may be present. In addition, if a layer/element is "on" another layer/element in one orientation, then that layer/element may be "under" the other layer/element when the orientation is reversed.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the coupling system for zero-output heat supply of the low-pressure economizer and the low-pressure cylinder comprises a medium-pressure cylinder 2, a low-pressure cylinder 8, a medium-low pressure cylinder communicating pipe 3, a sealing valve 7, a low-pressure cylinder exhaust pipeline 9, a condenser 10, a deaerator 24, a heat supply network heater 21, a low-pressure economizer 19, a first connecting door 12, a second connecting door 25 and a third connecting door 15;
the intermediate pressure cylinder 2 and the low pressure cylinder 8 are connected through the intermediate pressure cylinder communicating pipe 3; the sealing valve 7 is arranged on the intermediate and low pressure cylinder communicating pipe 3; the middle and low pressure cylinder communicating pipe 3 is connected in parallel with a cooling steam system, which comprises a cooling steam pipeline 4, and a regulating valve 5 and a flow orifice plate 6 which are both arranged on the cooling steam pipeline 4; the heat supply network heater 21 is connected with the low-pressure economizer 19 in parallel, the inlet of the pipe side of the heat supply network heater 21 is connected with the low-temperature heat supply network circulating water pipe 11 and is communicated with the inlet water pipe 14 of the low-pressure economizer through a first communication pipeline 13, and the outlet of the pipe side of the heat supply network heater 21 is connected with the high-temperature heat supply network circulating water pipe 23 and is communicated with the outlet water pipe 17 of the low-pressure economizer through a second communication pipeline 26; a first connecting door 12 is arranged on the first connecting pipeline 13, a second connecting door 25 is arranged on the second connecting pipeline 26, the low-pressure economizer inlet water pipe 14 is connected with the low-pressure economizer outlet water pipe 17 and is provided with a third connecting door 15, and a booster pump 16 is also arranged on the low-pressure economizer inlet water pipe 14; the intermediate pressure cylinder 2 is connected with a shell side inlet of a heat supply network heater 21 through a heat supply steam extraction pipeline 29, a shell side outlet of the heat supply network heater 21 is connected with an inlet of a heat supply network drain pump 22, an outlet of the heat supply network drain pump 22 is divided into two paths, one path is connected with a deaerator 24, and the other path is connected with a hot well of a condenser 10 through a condenser inlet drain pipe 27 provided with a fourth connecting door 28; the smoke side inlet of the low-pressure coal economizer 19 is connected with an outlet smoke exhaust pipeline 20 of the air preheater, and the smoke side outlet of the low-pressure coal economizer 19 is connected with an inlet smoke pipeline 18 of the electric dust remover.
The principle of the invention is as follows:
when the low-pressure cylinder zero-output heat supply mode is adopted, the original low-pressure cylinder inlet steam enters the heat supply network heater to heat the heat supply network circulating water, then the drain water is converged into the deaerator through the heat supply network drain pump, and only a small amount of cooling steam enters the low-pressure cylinder and then is discharged to the condenser, so that the amount of condensed water is very small. For a subcritical heat supply unit provided with a low-pressure economizer system, a connecting door of heat supply network circulating water and condensed water is opened, a shunting part of low-temperature heat supply network circulating water (about 50-60 ℃) enters a low-pressure economizer, the circulating water returns to a high-temperature heat supply network circulating water pipe after being heated, the connecting door of an inlet and outlet water pipe of the low-pressure economizer is opened, a small amount of high-temperature water (about 100-110 ℃) at a water side outlet of the low-pressure economizer is shunted and is converged into an inlet of the low-pressure economizer to adjust the water temperature to be more than 70 ℃, and therefore low-temperature corrosion of a heat exchange pipe of. Under the zero-output heat supply operation condition of the low-pressure cylinder of the unit, the normal operation of the low-pressure economizer system is ensured, the waste heat of the discharged smoke is recovered, the temperature of the discharged smoke is reduced, the efficiency of the electric dust collector is improved, and the energy-saving and environment-friendly indexes of the unit are improved. If the heat supply network circulating water pipeline is far away from the low-pressure economizer or the water quality of the heat supply network circulating water is unqualified and other reasons cannot lead the heat supply network circulating water into the low-pressure economizer, part of the drainage water at the outlet of the heat supply network drainage pump can be shunted and is converged into a condenser hot well for cooling through a drainage pipe at the inlet of a condenser, the low-pressure condensate quantity is increased, and the normal operation of the low-pressure economizer is ensured, but compared with the former operation mode, part of the drainage heat is lost, and the operation economy is relatively poor.
The working process of the invention is as follows:
the invention supplies steam to the middle pressure cylinder 2 through the middle pressure cylinder steam inlet pipeline 1, and the middle pressure cylinder 2 exhausts steam to the low pressure cylinder 8 through the middle pressure cylinder communicating pipe 3.
In the heat supply period, the sealing valve 7 of the communicating pipe of the medium and low pressure cylinder is closed to cut off the steam entering the communicating pipe 3 of the medium and low pressure cylinder, a small amount of cooling steam is introduced through the cooling steam pipeline 4 and is used for taking away the blast heat generated by the rotation of the low pressure rotor after the steam entering the low pressure cylinder 8 is cut off, and the flow of the cooling steam is controlled through the regulating valve 5 and the flow pore plate 6 arranged on the cooling steam pipeline 4.
When the low-pressure cylinder zero-output heat supply mode is adopted for operation, most of the steam entering the original low-pressure cylinder 8 enters the heat supply network heater 21 through the heat supply steam extraction pipeline 29 to heat the circulating water of the heat supply network, then the drain water of the heat supply network heater 21 is converged into the deaerator 24 through the heat supply network drain pump 22, only a small amount of cooling steam enters the low-pressure cylinder 8 and then is discharged to the condenser 10 through the low-pressure cylinder steam discharge pipeline 9, and therefore the amount of condensed water is small; for a subcritical heat supply unit provided with a low-pressure economizer 19 system, a first contact door 12 on a first contact pipeline 13 and a second contact door 25 on a second contact pipeline 26 are opened, a low-temperature heat supply network circulating water pipe 11 is in contact with a low-pressure economizer inlet water pipe 13, a high-temperature heat supply network circulating water pipe 23 is in contact with a low-pressure economizer outlet water pipe 17, low-temperature heat supply network circulating water with the temperature of 50-60 ℃ is branched, and the low-temperature heat supply network circulating water enters a low-temperature economizer 19 to exchange heat with high-temperature flue gas in a smoke exhaust pipeline and then converges into a high-temperature heat supply network circulating water pipe 23; and (3) opening a third connecting door 15 of the water inlet and outlet pipes of the low-pressure economizer, shunting part of high-temperature water flowing out of the low-pressure economizer 19, converging the high-temperature water into the upstream position of a booster pump 16 at the water side inlet of the low-pressure economizer 19 at about 100-110 ℃, and adjusting the water temperature at the water side inlet of the low-pressure economizer 19 to be more than 70 ℃, so that the low-temperature corrosion of the heat exchange pipe of the low-pressure economizer can be avoided. If the low-temperature heat supply network circulating water pipeline 11 is far away from the low-pressure economizer 19 or the water quality of the heat supply network circulating water is unqualified and other reasons cannot lead the heat supply network circulating water into the low-pressure economizer 19, the fourth connecting door 28 can be opened to shunt part of drainage at the outlet of the heat supply network drainage pump 22, and the drainage is converged into the hot well of the condenser 10 through the condenser inlet drainage pipe 27 to reduce the temperature, so that the low-pressure condensate quantity is increased, and the normal operation of the low-pressure economizer is ensured. The two modes can ensure the normal operation of the low-pressure economizer system, recover the waste heat of the discharged smoke, reduce the temperature of the discharged smoke, improve the efficiency of the electric dust remover and improve the energy-saving and environment-friendly indexes of the unit when the unit operates by adopting a low-pressure cylinder zero-output heat supply mode, but the latter loses part of hydrophobic heat, and the operation economy of the former is relatively better.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (6)
1. A coupling system of a low-pressure economizer and a low-pressure cylinder with zero output heat supply is characterized by comprising:
the intermediate pressure cylinder (2) and the low pressure cylinder (8) are connected through the intermediate and low pressure cylinder communicating pipe (3), and the intermediate and low pressure cylinder communicating pipe (3) is connected with a cooling steam system in parallel; the steam outlet end of the intermediate pressure cylinder (2) is connected with the shell side inlet of the heat supply network heater (21), and the steam outlet end of the low pressure cylinder (8) is connected with the inlet of the condenser (10);
the shell side outlet of the heat supply network heater (21) is connected with a heat supply network drain pump (22), the outlet of the heat supply network drain pump (22) is divided into two paths, one path is connected with a deaerator (24), and the other path is connected with a heat well of a condenser (10); the inlet of the pipe side of the heat supply network heater (21) is connected with the low-temperature heat supply network circulating water pipe (11), and the outlet of the pipe side is connected with the high-temperature heat supply network circulating water pipe (23); two ends of a pipe side inlet and a pipe side outlet of the heat supply network heater (21) are connected with a low-pressure economizer (19) in parallel;
the inlet water pipe (14) of the low-pressure economizer (19) is communicated with the low-temperature heat supply network circulating water pipe (11), and the outlet water pipe (17) is communicated with the high-temperature heat supply network circulating water pipe (23); the flue gas side inlet of the low-pressure economizer (19) is communicated with an outlet smoke exhaust pipeline (20) of the air preheater, and the flue gas side outlet is communicated with an inlet flue gas pipeline (18) of the electric dust collector.
2. The coupling system for zero-output heating of a low-pressure economizer and a low-pressure cylinder according to claim 1, characterized in that a sealing valve (7) is arranged on the intermediate and low-pressure cylinder communicating pipe (3); the cooling steam system comprises a cooling steam pipeline (4) which is connected with the medium-low pressure cylinder communicating pipe (3) in parallel, and the cooling steam pipeline (4) is provided with an adjusting valve (5) and a flow orifice plate (6).
3. The coupling system for zero-output heating of a low-pressure economizer and a low-pressure cylinder according to claim 1, characterized in that a first connecting door (12) and a booster pump (16) are arranged on the inlet water pipe (14); the inlet of the first connecting door (12) is communicated with the low-temperature heat supply network circulating water pipe (11), the outlet of the first connecting door is connected with the inlet of the booster pump (16), and the outlet of the booster pump (16) is connected with the inlet of the low-pressure economizer (19).
4. The coupling system of the low-pressure economizer and the low-pressure cylinder with zero output heat supply as claimed in claim 1, characterized in that a second coupling door (25) is arranged on the outlet water pipe (17), and the outlet of the second coupling door (25) is communicated with the high-temperature heat supply network circulating water pipe (23).
5. The coupling system for the low-pressure economizer and zero-output heating of low-pressure cylinders according to claim 1, 3 or 4, characterized in that the inlet water pipe (14) and the outlet water pipe (17) are connected by a third connecting door (15).
6. The system for coupling a low-pressure economizer and a low-pressure cylinder with zero output heat supply according to claim 1, characterized in that a fourth connection door (28) is arranged on a condenser inlet drain pipe (27) between the heat supply network drain pump (22) and the condenser (10).
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| CN201911281956.2A CN110872959A (en) | 2019-12-13 | 2019-12-13 | Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system |
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| CN201911281956.2A CN110872959A (en) | 2019-12-13 | 2019-12-13 | Low-pressure economizer and low-pressure cylinder zero-output heat supply coupling system |
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Cited By (1)
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| CN111288531A (en) * | 2020-03-31 | 2020-06-16 | 西安西热节能技术有限公司 | Emergency heating system and method based on high-low pressure bypass combined heating |
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| CN111288531A (en) * | 2020-03-31 | 2020-06-16 | 西安西热节能技术有限公司 | Emergency heating system and method based on high-low pressure bypass combined heating |
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