System for extracting condensed water in hot well of steam turbine condenser

Abstract

The utility model relates to an extraction system for condensed water in a hot well of a steam turbine condenser, which is applied to the technical field of steam turbine generator sets, solves the problems that the extraction system is easy to vibrate, easy to break down, inconvenient to maintain and low in working efficiency during working, and comprises a water pumping assembly I and a water pumping assembly II, the water pumping assembly I and the water pumping assembly II each comprise a condensate pump and a driving motor for driving the condensate pump to work, a water inlet of each condensate pump is connected with the water pumping main pipe through a first hose, and a water outlet of each condensate pump is connected with the water outlet branch pipe through a first hose. The driving motor is connected with the condensate pump through a diaphragm coupling; the condensate pump has the advantages that vibration energy generated on the water pumping main pipe and the water outlet branch pipes when the condensate pump pumps water can be absorbed, the vibration reduction and noise reduction effects can be achieved, the problem of large vibration in the working process is obviously solved, and the fault rate is reduced.

Description

TECHNICAL FIELD

[0001] The utility model discloses the technical field of steam turbine condenser hot well, in particular to a steam turbine condenser hot well inside condensate water extraction system. BACKGROUND

[0002] The prior art patent publication number "CN105065069A" discloses a condensate water extraction device of steam turbine generator unit, comprising: two condensate water pumps, the water inlets of the two condensate water pumps are communicated with the hot well of the condenser through the water pumping main pipe, the water outlets of the two condensate water pumps are respectively communicated with the water outlet main pipe through a water outlet branch pipe, a water outlet valve group capable of shutting off the water outlet branch pipe is arranged on each water outlet branch pipe, a packing chamber is arranged on the pump casing of each condensate water pump, and a packing chamber water inlet hole is arranged on each packing chamber; one end of each packing chamber water inlet hole is connected with one end of a sealing water guide pipe, and the other end of the sealing water guide pipe is connected with a pipeline communicated with the water outlet side of the water outlet valve group. The condensate water extraction device of steam turbine generator unit can inject water into the packing chamber of the two condensate water pumps, so that air is not easy to enter the condensate water pump, and the packing and the rotating shaft can be cooled well.

[0003] The above description has the following problems: the condensate water pump is easy to vibrate when working, and the condensate water pump is rigidly connected with the water pumping main pipe and the water outlet branch pipe, so that the vibration of the water pumping main pipe, the water outlet branch pipe and the water outlet main pipe is easy to cause faults, frequent replacement is required, and the working efficiency is reduced. UTILITY MODEL CONTENTS

[0004] The utility model discloses a steam turbine condenser hot well inside condensate water extraction system, solve the extraction system and vibrate when working, prone to failure, inconvenient maintenance, reduce the problem of working efficiency.

[0005] To achieve the above object, the utility model adopts the technical scheme that:

[0006] The utility model discloses a steam turbine condenser hot well inside condensate water extraction system, including pump water subassembly I and pump water subassembly II, the water inlet of pump water subassembly I and pump water subassembly II all are communicated with the hot well of condenser through the water pumping main pipe, the water outlet of pump water subassembly I and pump water subassembly II all are communicated with the water outlet main pipe that can supply water to the boiler through the water outlet branch pipe, pump water subassembly I and pump water subassembly II all include condensate water pump and drive motor that drive the working of condensate water pump, the water inlet of condensate water pump and the water outlet of condensate water pump all are connected through first hose, and drive motor and condensate water pump are connected through diaphragm coupling.

[0007] Further, the hose adopts stainless steel corrugated expansion joint.

[0008] Further, the water pumping main pipe is provided with a filter.

[0009] Further, a switching assembly is further included, the switching assembly includes an electric gate valve and a control element respectively arranged on each water outlet branch pipe, and the control element is used for controlling the start and stop of the electric gate valve and the driving motor.

[0010] Further, the driving motor is a variable frequency motor.

[0011] Further, at least one second hose is arranged on the water outlet main pipe, and the second hose also adopts a stainless steel bellows expansion joint.

[0012] Thanks to the above technical scheme, the utility model has the following advantages compared with the prior art:

[0013] The steam turbine condenser hot well inner condensate water pumping system can absorb the vibration energy generated by the condensate water pump when pumping water to the water pumping main pipe and the water outlet branch pipe, can play a role of vibration reduction and sound elimination, so that the problem of large vibration of the condensate water pump, the water pumping main pipe and the water outlet branch pipe is obviously improved, and the failure rate is reduced.

[0014] The driving motor and the condensate water pump are connected through the diaphragm coupling, so that the vibration generated by the water pumping assembly I or the water pumping assembly II when working can be greatly reduced, when the diaphragm coupling is damaged after long time work, the diaphragm can be directly replaced, without moving the water pump or the motor, without damaging the original concentricity, so that the maintenance time is greatly saved.

[0015] Further, when one of the condensate water pumps is faulty, the switching assembly is arranged, the control element can immediately automatically open the standby condensate water pump and the standby electric gate valve, so that the continuous pumping of the condensate water in the hot well is realized, manual operation is not needed, and automatic switching is realized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Some specific embodiments of the utility model will be described in detail hereinafter with reference to the drawings in an exemplary but not restrictive manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0017] Figure 1 is the overall structure schematic view in the preferred embodiment of the utility model;

[0018] Figure 2 is the overall structure partial enlarged view in the preferred embodiment of the utility model;

[0019] Figure 3 is Figure 2 is an enlarged view of A in FIG.

[0020] In the drawings:

[0021] 1, pump water assembly I; 11, condensate pump; 12, driving motor;

[0022] 2, pump water assembly II;

[0023] 3, water pumping main pipe;

[0024] 4, water outlet branch pipe;

[0025] 5, water outlet main pipe;

[0026] 6, condenser;

[0027] 7, hot well;

[0028] 8, first hose;

[0029] 9, diaphragm coupling;

[0030] 10, switching assembly; 101, electric gate valve; 102, control member;

[0031] 13, filter;

[0032] 14, second hose. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0036] ReferenceFigure 1 、 Figure 2 and Figure 3 , the utility model provides a steam turbine condenser hot well inside condensate water extraction system, including pump water subassembly Ⅰ1 and pump water subassembly Ⅱ2, the water inlet of pump water subassembly Ⅰ1 and pump water subassembly Ⅱ2 all are connected with the hot well 7 of condenser 6 through pumping main pipe 3, and the water outlet of pump water subassembly Ⅰ1 and pump water subassembly Ⅱ2 all are connected with the water outlet main pipe 5 of the water supply of boiler through water outlet branch pipe 4, under the cooperation of pump water subassembly Ⅰ1 and pump water subassembly Ⅱ2 make this extraction system is one spare one use mode.

[0037] Reference Figure 1 、 Figure 2 and Figure 3 , pump water subassembly Ⅰ1 and pump water subassembly Ⅱ2 all include condensate pump 11 and drive motor 12 for driving condensate pump 11 work, and the water inlet of condensate pump 11 is connected with pumping main pipe 3, and the water outlet of condensate pump 11 is connected with water outlet branch pipe 4 all through first hose 8, and first hose 8 adopts stainless steel bellows expansion joint, and drive motor 12 is connected with condensate pump 11 through diaphragm coupling 9.In the condensate water in hot well 7 is extracted, and the vibration energy that the stainless steel bellows expansion joint set can absorb condensate pump 11 pumps water to pumping main pipe 3 and water outlet branch pipe 4 is generated, can play the role of vibration reduction, sound reduction, thereby the condensate pump 11, pumping main pipe 3, water outlet branch pipe 4 vibration big problem is obviously improved, and the failure rate is reduced.

[0038] Reference Figure 1 、 Figure 2 and Figure 3 , drive motor 12 and condensate pump 11 are connected through diaphragm coupling 9, can greatly reduce the vibration that pump water subassembly Ⅰ1 or pump water subassembly Ⅱ2 generates when working.When diaphragm coupling is damaged after long time work, directly replace diaphragm, do not need to move water pump or motor, do not destroy the original concentricity, greatly save the overhaul time.

[0039] Reference Figure 1 、 Figure 2 and Figure 3 , still include switching assembly 10, and switching assembly 10 includes electric gate valve 101 and control 102 respectively set on each pumping main pipe 3, and control 102 is used to control the start-stop of electric gate valve 101 and drive motor 12, through the switching assembly 10 set, when one condensate pump 11 fails, through control 102 can immediately automatically open the condensate pump 11 of spare and the electric gate valve 101 in spare, realizes the continuous extraction of condensate water in hot well 7, need not manual operation, realizes the automation switching.

[0040] Reference Figure 1 、 Figure 2 and Figure 3The driving motor 12 is a variable frequency motor, and the rotation speed of the motor can be controlled by a frequency converter, so that the flow and pressure of the system can be adjusted according to actual requirements, and energy consumption is saved.

[0041] With reference to Figure 1 , Figure 2 and Figure 3 , the filter 13 is arranged on the water pumping main pipe 3, and the impurities in the condensed water can be filtered through the filter 13, so that the condensed water pump 11 is prevented from being damaged by the impurities.

[0042] With reference to Figure 1 , Figure 2 and Figure 3 , the at least one second hose 14 is arranged on the water outlet main pipe 5, and two second hoses 14 are arranged in the example, and the two second hoses 14 also adopt the stainless steel corrugated expansion joints, and the two soft connections arranged on the water outlet main pipe 5 can isolate the vibration source, so that the stability of the water pumping system during operation is improved.

[0043] In summary, when the condensed water in the hot well is pumped by the water pumping system, the problem of large vibration of the condensed water pump and the pipeline can be obviously improved, and the failure rate is obviously reduced.

[0044] The above examples are only for illustrating the technical concept and characteristics of the utility model, and the purpose is to enable the person skilled in the art to understand the content of the utility model and implement it, and the protection scope of the utility model cannot be limited by the above examples, and any equivalent changes or modifications according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.

Claims

1. A condensate extraction system for a steam turbine condenser hot well, comprising a pump assembly I (1) and a pump assembly II (2), wherein the inlets of both the pump assembly I (1) and the pump assembly II (2) are connected to the hot well (7) of the condenser (6) via a main pumping pipe (3), and the outlets of both the pump assembly I (1) and the pump assembly II (2) are connected to a main outlet pipe (5) that supplies water to the boiler via outlet branch pipes (4), characterized in that, Both the pump assembly I (1) and the pump assembly II (2) include a condensate pump (11) and a drive motor (12) for driving the condensate pump (11). The inlet of the condensate pump (11) is connected to the main pumping pipe (3), and the outlet of the condensate pump (11) is connected to the outlet branch pipe (4) through a first flexible hose (8). The drive motor (12) is connected to the condensate pump (11) through a diaphragm coupling (9).

2. The condensate extraction system in the hot well of the steam turbine condenser according to claim 1, characterized in that, The first hose (8) is made of stainless steel corrugated expansion joint.

3. The condensate extraction system in the hot well of the steam turbine condenser according to claim 1 or 2, characterized in that, A filter (13) is installed on the main water pumping pipe (3).

4. The condensate extraction system in the hot well of the steam turbine condenser according to claim 3, characterized in that, It also includes a switching component (10), which includes an electric gate valve (101) and a control component (102) respectively disposed on each of the outlet branch pipes (4). The control component (102) is used to control the start and stop of the drive motor (12) of the electric gate valve (101).

5. The condensate extraction system in the hot well of the steam turbine condenser according to claim 4, characterized in that, The drive motor (12) is a variable frequency motor.

6. The condensate extraction system in the hot well of the steam turbine condenser according to claim 2, characterized in that, At least one second hose (14) is provided on the main water outlet pipe (5), and the second hose (14) is also made of stainless steel corrugated expansion joint.

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