CN217686817U

CN217686817U - Heat exchange system of extraction condensing type generator set

Info

Publication number: CN217686817U
Application number: CN202221832707.5U
Authority: CN
Inventors: 孙钦富; 刘学亮
Original assignee: Shandong Shenghe Thermal Energy Co ltd; Shandong Bohai Industrial Group Co ltd
Current assignee: Shandong Shenghe Thermal Energy Co ltd; Shandong Bohai Industrial Group Co ltd
Priority date: 2022-07-14
Filing date: 2022-07-14
Publication date: 2022-10-28
Anticipated expiration: 2032-07-14

Abstract

The utility model relates to a thermal power plant equipment technical field, concretely relates to take out congealing formula generating set heat transfer system. The utility model provides a heat exchange system of a condensing generator set, which comprises a steam turbine, an air inlet pipeline, a steam exhaust heat exchanger, a condensate pipeline and a deaerator which are sequentially communicated; the exhaust of the steam turbine enters the exhaust heat exchanger through the air inlet pipeline, and is discharged to the deaerator for deaerating through the condensate pipeline after condensate water is formed; the heat exchange system of the extraction condensing generator set also comprises a low-pressure heater, and steam discharged from the gas outlet of the steam discharge heat exchanger is communicated with the low-pressure heater through a steam pipeline and heats the low-pressure heater; the exhaust heat exchanger is also connected with a heat supply network circulation pipeline for exchanging heat by the exhaust heat exchanger. Through changing original condenser into the exhaust heat exchanger, the exhaust heat exchanger is used for low pressure heater's heating with the steam of the higher energy storage of steam turbine exhaust steam separation part, has increased the heat utilization efficiency of system, improves the efficiency of system.

Description

Heat exchange system of extraction condensing type generator set

Technical Field

The utility model relates to a thermal power plant equipment technical field, concretely relates to take out congealing formula generating set heat transfer system.

Background

The generator set operated by the existing power plant is characterized in that raw water is desalted by a desalted water station and then pumped into a boiler deaerator by a desalted water pump, and the raw water is pumped into a boiler by a feed pump to be heated to generate steam after being heated to be deaerated. High parameter steam gets into and takes out condensing steam turbine, steam does work the back in the steam turbine, can pass through the extraction opening and the gas vent exhaust steam turbine of steam turbine, for the utilization ratio that improves the energy, power plant utilizes steam turbine extraction opening exhaust steam to supply heat for the user usually at present, and steam turbine gas vent exhaust steam can't obtain effectual utilization, also exist at present and utilize steam turbine gas vent exhaust steam to pass through the heat that the condenser extracted in the steam for user's heat supply, but general equipment input cost and transformation cost are great, have certain defect, along with the improvement of thermal power plant operation maintenance level, energy saving and consumption reduction has provided new requirement to the unit.

SUMMERY OF THE UTILITY MODEL

The utility model discloses (one) the technical problem that solve is: the existing condenser of the extraction condensing unit has poor heat recovery effect and can not achieve ideal heat recovery effect.

(II) technical scheme

In order to solve the technical problem, an embodiment of the present invention provides a heat exchange system for a condensing power generator set, which includes a steam turbine, an air inlet pipeline, an exhaust heat exchanger, a condensing water pipeline and a deaerator, which are sequentially connected; the exhaust of the steam turbine enters the exhaust heat exchanger through the air inlet pipeline, and is discharged to the deaerator for deaerating through the condensate pipeline after condensate water is formed;

the heat exchange system of the extraction condensing type generator set also comprises a low-pressure heater, and steam exhausted from an air outlet of the steam exhaust heat exchanger is communicated with the low-pressure heater through a steam pipeline and heats the low-pressure heater; the exhaust steam heat exchanger is also connected with a heat supply network circulation pipeline for exchanging heat by the exhaust steam heat exchanger.

According to the utility model discloses an embodiment, process low pressure feed water heater's exhaust connects to the bearing seal air exhauster, and the bearing seal air exhauster inhales waste gas bearing seal cooler recycle to make and maintain certain negative pressure in the bearing seal cooler.

According to the utility model discloses an embodiment, the air inlet pipeline has still connect the hydrophobic expansion tank, collects the condensate water that steam passes through the in-process part steam cold production that the admission line preheated, avoids causing the influence to exhaust heat exchanger's work efficiency.

According to the utility model discloses an embodiment, the comdenstion water that hydrophobic expansion tank communicated to low flush tank, further stored and utilized the hydrophobic expansion tank to collect.

According to the utility model discloses an embodiment, the condensate pipeline still is equipped with the filtering mechanism who is used for filtering the comdenstion water, filtering mechanism is used for filtering the partial impurity that probably exists in the comdenstion water.

According to the utility model discloses an embodiment, the air inlet pipeline with the steam turbine junction is reducing pipe joint, is convenient for the air inlet pipeline with the grafting of the gas vent of steam turbine.

According to the utility model discloses an embodiment, exhaust radiator bottom has connect the hot-well, the collection of the comdenstion water that the hot-well is convenient for produce heat rejecting heat exchanger.

According to the utility model discloses an embodiment, the steam pipe still has connect the income trachea of reverse input steam for when the steam turbine stop work, through the external steam of income trachea input of reverse input steam, guarantee the extraction of the incessant heat energy of heat supply network circulation pipeline, guaranteed the continuous heat supply of heat supply network system.

According to the utility model discloses an embodiment still is equipped with condensate pump on the condensate pipe way.

The utility model has the advantages that: the utility model provides a take out condensing generating set heat transfer system is through changing original condenser for the exhaust heat exchanger, and the exhaust heat exchanger is used for low pressure feed water heater's heating with the higher energy storage of steam turbine exhaust steam separation part, and another is by heat supply network circulation pipeline heat absorption condensation, has increased the heat utilization efficiency of system, improves the efficiency of system.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a heat exchange system of a pumped condensing generator set according to an embodiment of the present invention.

Icon: 1. a steam turbine; 11. an air intake line; 12. a reducing pipe joint; 2. a steam exhaust heat exchanger; 21. a hot well; 22. a condensate line; 23. a condensate pump; 24. a steam line; 25. entering an air pipe; 26. a filtering mechanism; 3. a deaerator; 4. a low pressure heater; 5. a heat supply network circulation line; 6. a shaft seal exhaust fan; 7. a water drainage expansion tank; 8. a low level water tank.

Detailed Description

In order to make the above objects, features and advantages of the present invention more clearly understandable, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description, and the embodiments and features of the embodiments of the present invention may be combined with each other without conflict. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a take out congealing formula generating set heat transfer system for solve original system condenser heat collection poor problem, include: the system comprises a steam turbine 1, an air inlet pipeline 11, an exhaust steam heat exchanger 2, a condensate pipeline 22 and a deaerator 3 which are communicated in sequence; the exhaust gas of the steam turbine 1 enters the exhaust heat exchanger 2 through the air inlet pipeline 11, and is discharged to the deaerator 3 through the condensate pipeline 22 to be deaerated after condensate water is formed;

the heat exchange system of the extraction condensing generator set further comprises a low-pressure heater 4, and steam discharged from the air outlet of the steam discharge heat exchanger 2 is communicated with the low-pressure heater 4 through a steam pipeline 24 and heats the low-pressure heater 4; the exhaust steam heat exchanger 2 is also connected with a heat supply network circulation pipeline 5 for exchanging heat by the exhaust steam heat exchanger 2.

Further, the exhaust gas passing through the low-pressure heater 4 is connected to a shaft seal exhaust fan 6, the exhaust gas is sucked into the shaft seal cooler through the shaft seal exhaust fan 6 for recycling, and a certain negative pressure is maintained in the shaft seal cooler.

Furthermore, the air inlet pipeline 11 is also connected with a hydrophobic expansion tank 7, and condensed water generated by partial steam cooling in the process of preheating steam through the air inlet pipeline is collected, so that the influence on the working efficiency of the exhaust heat exchanger is avoided.

Further, the drain expansion tank 7 is communicated to the low-level water tank 8, and condensed water collected by the drain expansion tank 7 is further stored and utilized.

Furthermore, a filtering mechanism 26 for filtering the condensed water is further disposed on the condensed water pipeline 22, and the filtering mechanism 26 is used for filtering out a portion of impurities that may be present in the condensed water.

Furthermore, the connection between the air inlet pipeline 11 and the steam turbine 1 is a reducing pipe joint 12, which facilitates the insertion of the air inlet pipeline 11 and the exhaust port of the steam turbine 1.

Further, a heat well 21 is connected to the bottom of the exhaust radiator, and the heat well 21 is convenient for collecting condensed water generated by the heat rejecting heat exchanger.

Furthermore, the steam pipe is also connected with an air inlet pipe 25 for reversely inputting steam, so that when the steam turbine 1 stops working, external steam is input through the air inlet pipe 25 for reversely inputting steam, the heat supply network circulating pipeline 5 is ensured to extract uninterrupted heat energy, and the continuous heat supply of the heat supply network system is ensured.

According to an embodiment of the present invention, a condensate pump 23 is further disposed on the condensate pipeline 22.

The specific process is that the boiler heats the water input by the deaerator 3 into high pressure steam, the steam high pressure steam enters the steam turbine 1 to drive the steam turbine 1 to do work to generate electricity for the generator, the exhausted steam discharged in the process is discharged to the exhaust heat exchanger through the air inlet pipe communicated with the exhaust port of the steam turbine 1, the exhaust heat exchanger divides the steam into streams, one part of the streams is communicated to the low-pressure heater 4 through the steam pipeline 24, the low-pressure heater 4 is heated, and finally the streams are recovered to the shaft seal cooler through the shaft seal exhaust fan 6, and the other part of the streams is circulated to the boiler through the deaerator 3 after being subjected to heat exchange and condensation through the circulating heat network.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to both elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The extraction condensing type generator set heat exchange system is characterized by comprising a steam turbine (1), an air inlet pipeline (11), an exhaust steam heat exchanger (2), a condensate pipeline (22) and a deaerator (3) which are sequentially communicated; the exhaust gas of the steam turbine (1) enters the exhaust steam heat exchanger (2) through the air inlet pipeline (11), and is discharged to the deaerator (3) for deaerating through the condensate pipeline (22) after condensate water is formed;

the heat exchange system of the extraction condensing generator set also comprises a low-pressure heater (4), and steam discharged from the gas outlet of the steam discharge heat exchanger (2) is communicated with the low-pressure heater (4) through a steam pipeline (24) and heats the low-pressure heater; the exhaust steam heat exchanger (2) is also connected with a heat supply network circulating pipeline (5) for exchanging heat by the exhaust steam heat exchanger (2).

2. The heat exchange system of an extraction condensing power generator set according to claim 1, characterized in that the exhaust air passing through the low pressure heater (4) is connected to a shaft seal exhaust fan (6).

3. The heat exchange system of the extraction condensing generator set according to the claim 2, characterized in that the air inlet pipeline (11) is further connected with a water drainage expansion tank (7).

4. The pump condensing generator set heat exchange system according to claim 3, wherein the hydrophobic expansion tank (7) is connected to the low level water tank (8).

5. The heat exchange system of the extraction condensing generator set according to claim 1, wherein the condensed water pipeline (22) is further provided with a filtering mechanism (26) for filtering condensed water.

6. The heat exchange system of the extraction condensing generator set according to the claim 1 is characterized in that the connection of the air inlet pipeline (11) and the steam turbine (1) is a reducing pipe joint (12).

7. The heat exchange system of the extraction condensing generator set according to claim 1, characterized in that the bottom of the exhaust heat exchanger is connected with a heat well (21).

8. The heat exchange system of the extraction condensing power unit according to any one of claims 1 to 7, characterized in that the steam pipe is further connected with an inlet pipe (25) for inputting steam reversely.

9. The heat exchange system of the extraction condensing generator set according to claim 8, wherein a condensate pump (23) is further provided on the condensate pipeline (22).