CN113669718A - Water supplementing control system and method for heat supply unit - Google Patents

Abstract

The invention discloses a water supplementing control system of a heat supply unit, which comprises a condensation pump set, a deaerator and a deaerator water supplementing pipeline, wherein the deaerator is connected with the condensation pump set through a deaerator water feeding pipeline, and the deaerator water supplementing pipeline is connected with an outlet main pipe of the condensation pump set, so that desalted water supplied by the deaerator water supplementing pipeline can be directly supplemented to the deaerator through the deaerator water feeding pipeline, water supplementing for the deaerator through the condensation pump set is not needed, the intermediate link of water supplementing of the deaerator is reduced, the energy consumption of the condensation pump set is effectively reduced, and the energy saving is facilitated. The invention also discloses a water replenishing control method for the heat supply unit.

Description

Water supplementing control system and method for heat supply unit

Technical Field

The invention relates to the technical field of heat supply, in particular to a water supplementing control system of a heat supply unit. The invention further relates to a water supplementing control method of the heat supply unit.

Background

The existing water replenishing control system of the heat supply unit comprises a condenser, a condensation pump set, a shaft seal heater and a deaerator which are sequentially connected through pipelines, wherein the deaerator and the condenser are a buffering link in the whole system, the water level of the deaerator and the condenser is one of important parameters needing to be monitored during unit operation, and the safe and economic operation of the unit is influenced when the water level is too high or too low, so that the water level of the deaerator and the condenser is very necessary to be accurately controlled.

The condenser is not usually recovered due to the influences of factors such as steam supply distance, production process, investment and the like, and in order to maintain the steam-water balance of a unit, equivalent demineralized water needs to be supplemented into the condenser, and meanwhile, the deaerator needs to be used for synchronous thermal deaeration, so that the safe operation of the system is ensured.

However, the existing water supply pipeline is directly connected to the condenser, the water supply pipeline needs to continuously supply demineralized water to the condenser for a long time, the water supply amount is too large, the condensate pump group needs to pump water from the condenser for a long time, the energy consumption of the condensate pump group is too large, and the energy conservation is not facilitated.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a water replenishing control system for a heat supply unit, in which a water replenishing pipeline of a deaerator is connected to an outlet main pipe of a condensation pump set, so that desalted water supplied by the water replenishing pipeline of the deaerator can be directly replenished to the deaerator through the water replenishing pipeline of the deaerator, and an intermediate link of water replenishing is provided, which is beneficial to reducing energy consumption and realizing energy saving. The invention also aims to provide a water replenishing control method for the heat supply unit.

The invention provides a water supplementing control system of a heat supply unit, which comprises a condensation pump set, a deaerator connected with the condensation pump set through a deaerator water feeding pipeline, and a deaerator water supplementing pipeline connected with an outlet main pipe of the condensation pump set, wherein desalted water supplied by the deaerator water supplementing pipeline is directly supplemented to the deaerator through the deaerator water feeding pipeline.

Preferably, the system also comprises a condenser water level controller, a desalination pump set, a condenser water replenishing pipeline connected between the desalination pump set and the condenser, and a condenser water level detection element for detecting the water level of the condenser, wherein the condenser water replenishing pipeline is provided with a condenser water replenishing valve;

when the condenser water level detection element detects that the water level of the condenser is lower than the preset water level, the condenser water level controller increases the rotating speed of a frequency converter of the desalting pump set according to the received condenser water feeding instruction and the low water level instruction fed back by the condenser water level detection element and simultaneously opens a condenser water replenishing valve, and the desalting water supplied by the desalting pump set is replenished to the condenser through a condenser water replenishing pipeline.

Preferably, the desalination pump group comprises at least one desalination water replenishing pipeline, and each desalination water replenishing pipeline comprises a desalination water pump, a desalination outlet valve and a desalination check valve arranged between the desalination water pump and the desalination outlet valve.

Preferably, when the condenser water level detection element detects that the water level of the condenser is higher than the preset water level, the condenser water level controller increases the rotating speed of a frequency converter of the condensation pump unit and closes a condenser water replenishing valve according to the received normal running state instruction of the unit and the high water level instruction fed back by the condenser water level detection element, and the condensation pump unit pumps redundant condensed water in the condenser to the deaerator through a deaerator water feeding pipeline.

Preferably, the device also comprises a deaerator flow controller, a shaft seal heater, a condensed water circulating pipeline connected between the shaft seal heater and the condenser, and a deaerator flow detecting piece for detecting the flow of the deaerator water supplementing pipeline, wherein the condensed water circulating pipeline is provided with a condensed water circulating valve;

when the deaerator flow detection piece detects that the flow of the deaerator water replenishing pipeline is lower than the preset flow, the deaerator flow controller opens the condensed water circulating valve according to the received normal running state instruction of the unit and the low flow instruction fed back by the deaerator flow detection piece, and redundant condensed water discharged by the shaft seal heater flows back to the condenser through the condensed water circulating pipeline.

Preferably, the system also comprises a deaerator water level controller, at least one deaerator branch pipeline which is respectively connected with the deaerator water feeding pipeline, and at least one deaerator water level detection piece which is respectively arranged on the deaerator branch pipelines in a one-to-one correspondence manner and is used for detecting the water level of a deaerator on the deaerator branch pipeline, wherein each deaerator branch pipeline is provided with a deaerator water feeding valve;

when one deaerator water level detection piece detects that the water level of a deaerator connected with the deaerator water level detection piece is inconsistent with the specified water level, the deaerator water level controller adjusts the rotating speed of a frequency converter of a desalting pump set according to the received normal operation state instruction of the single waste heat boiler and the water level abnormal instruction fed back by the deaerator water level detection piece and adjusts the opening degree of a corresponding deaerator water feeding valve to be maximum.

Preferably, the system also comprises a main pipe pressure controller and a main pipe pressure detection piece for detecting the pressure of an outlet main pipe of the condensation pump group, wherein when the main pipe pressure detection piece detects that the pressure of the outlet main pipe of the condensation pump group is inconsistent with the preset pressure, the main pipe pressure controller adjusts the rotating speed of a frequency converter of the desalination pump group according to the received normal operation state instructions of the waste heat boilers and the pressure abnormal instruction fed back by the main pipe pressure detection piece; and simultaneously, the deaerator water level controller adjusts the opening degree of a corresponding deaerator water feeding valve according to the received normal operation state instruction of the plurality of waste heat boilers and the water level abnormal instruction fed back by the at least one deaerator water level detection piece to adjust the water level of the deaerator.

The invention provides a water replenishing control method of a heat supply unit, which is applied to any one of the water replenishing control systems of the heat supply unit, and comprises the following steps:

the condenser water level detection element detects whether the water level of the condenser is lower than a preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of the desalting pump set and opens a condenser water replenishing valve according to the received condenser water feeding instruction and a low water level instruction fed back by the condenser water level detection element;

the condenser water level detection part detects whether the water level of the condenser is higher than the preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of a condensation pump set and closes a water replenishing valve of the condenser according to a received normal running state instruction of the unit and a high water level instruction fed back by the condenser water level detection part, and the condensation pump set automatically pumps redundant condensed water in the condenser to a deaerator through a deaerator water supply pipeline;

and detecting by a deaerator flow detection piece that the flow of the deaerator water replenishing pipeline is lower than a preset flow, and if so, opening the condensed water circulating valve by the deaerator flow controller according to the received unit normal operation state instruction and the low flow instruction fed back by the deaerator flow detection piece.

Preferably, the steps further comprise:

a deaerator water level controller receives the instruction of the normal running state of the unit;

the deaerator water level controller judges whether only one waste heat boiler normally operates, if so, the deaerator water level controller adjusts the rotating speed of a frequency converter of the desalting pump set according to a received normal operation state instruction of the single waste heat boiler and a water level abnormal instruction fed back by a deaerator water level detection piece and simultaneously adjusts the opening of a corresponding deaerator water feeding valve to be maximum; if not, the main pipe pressure detection piece detects whether the pressure of an outlet main pipe of the condensation pump group is inconsistent with a preset pressure, and if not, the main pipe pressure controller adjusts the rotating speed of a frequency converter of the desalination pump group according to a received normal operation state instruction of the waste heat boilers and a pressure abnormal instruction fed back by the main pipe pressure detection piece; and simultaneously, the deaerator water level controller adjusts the opening degree of the corresponding deaerator water feeding valve according to the received normal operation state instruction of the plurality of waste heat boilers and the water level abnormal instruction fed back by the deaerator water level detection piece to adjust the water level of the deaerator.

Compared with the background art, the water replenishing control system of the heat supply unit comprises a condensation pump set, a deaerator and a deaerator water replenishing pipeline, wherein the deaerator is connected with the condensation pump set through a deaerator water feeding pipeline, and the deaerator water replenishing pipeline is connected with an outlet main pipe of the condensation pump set.

The water replenishing control method for the heat supply unit has the same beneficial effects.

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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a water supplement control system of a heat supply unit according to an embodiment of the present invention;

fig. 2 is a flowchart of a water supplement control method for a heat supply unit according to an embodiment of the present invention.

The reference numbers are as follows:

the system comprises a desalination pump unit 1, a condenser water replenishing pipeline 2, a deaerator water replenishing pipeline 3, a condenser 4, a condensation pump unit 5, a deaerator water replenishing pipeline 6, a shaft seal heater 7, a condensed water circulating pipeline 8 and a deaerator branch pipeline 9;

a desalting inlet valve 11, a desalting water pump 12, a desalting check valve 13 and a desalting outlet valve 14;

a condenser water replenishing valve 21;

a deaerator water replenishing valve 31;

a condensation inlet valve 51, a condensation pump 52 and a condensation outlet valve 53;

a condensed water circulation valve 81;

a deaerator water feed valve 91.

Detailed Description

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, and not all of the embodiments. 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.

In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific examples.

Referring to fig. 1, fig. 1 is a schematic diagram of a water supplement control system of a heat supply unit according to an embodiment of the present invention;

the embodiment of the invention discloses a water supplementing control system of a heat supply unit, which comprises a condensation pump unit 5, a deaerator and a deaerator water supplementing pipeline 3.

The condensation pump group 5 comprises at least one condensation water supply pipeline, each condensation water supply pipeline is provided with a condensation pump 52, a condensation inlet valve 51 and a condensation outlet valve 53, the condensation inlet valve 51 is arranged at the inlet of the condensation pump 52, and the condensation outlet valve 53 is arranged at the outlet of the condensation pump 52. The number of the condensation water supply pipelines can be set according to the specification of the condenser 4, and the specific number is not limited. An inlet main pipe of the condensation pump unit 5 is connected with the condenser 4, and an outlet main pipe of the condensation pump unit is connected with the shaft seal heater 7 and used for pumping redundant water in the condenser 4 to the deaerator.

The deaerator links to each other through deaerator water supply pipeline 6 with condensation pump package 5, and shaft seal heater 7 locates deaerator water supply pipeline 6, makes condensation water that condensation pump package 5 took out from condenser 4 flow into the deaerator through deaerator water supply pipeline 6.

The one end of oxygen-eliminating device moisturizing pipeline 3 links to each other with the female pipe in the export of condensation pump package 5, and it is parallelly connected that also oxygen-eliminating device moisturizing pipeline 3 is parallelly connected with condensation pump package 5, and the demineralized water of 3 supplies of oxygen-eliminating device moisturizing pipeline directly supplys to the oxygen-eliminating device through water pipeline 6 on the oxygen-eliminating device, can need not to be the oxygen-eliminating device moisturizing through condensation pump package 5, reduces the intermediate link of oxygen-eliminating device moisturizing, effectively reduces condensation pump package 5's energy consumption, does benefit to energy-conservingly.

The deaerator water replenishing pipeline 3 is provided with a deaerator water replenishing valve 31, and the flow of the deaerator water replenishing pipeline 3 is adjusted by adjusting the opening degree of the deaerator water replenishing valve 31.

The invention also comprises a condenser water level controller, a desalination pump unit 1, a condenser 4, a condenser water replenishing pipeline 2 and a condenser water level detection element.

The deoxidizing pump set comprises at least one desalting and water supplementing pipeline, and each desalting and water supplementing pipeline comprises a desalting water pump 12 and a desalting inlet valve 11 and a desalting outlet valve 14 which are respectively provided with an inlet and an outlet of the desalting water pump 12. In order to improve the safety, each desalting and water supplementing pipeline also comprises a desalting check valve 13 arranged between the desalting pump 12 and the desalting outlet valve 14, so that the desalting water is prevented from flowing back to the desalting pump 12, and the desalting and water supplementing pipeline and the desalting pump 12 are effectively protected. The external demineralized water inlet main pipe of the desalting pump unit 1 is connected with a demineralized water inlet main pipe, the outlet main pipe of the desalting pump unit is respectively communicated with a condenser water replenishing pipeline 2 and a deaerator water replenishing pipeline 3, the condenser water replenishing pipeline 2 is communicated with the desalting pump unit 1 and a condenser 4, and the deaerator water replenishing pipeline 3 is communicated with the desalting pump unit 1 and the deaerator, so that the desalting pump unit 1 is used for supplying demineralized water for the condenser 4 and the deaerator respectively.

In addition, the condenser water replenishing pipeline 2 is provided with a condenser water replenishing valve 21, and the flow of the condenser water replenishing pipeline 2 is adjusted by adjusting the condenser water replenishing valve 21.

The water inlet of the condenser 4 is connected with the water replenishing pipeline 2 of the condenser, the water outlet of the condenser is connected with the condensation pump group 5, and the specification and the working principle can refer to the prior art.

The condenser water level detector is used to detect the water level of the condenser 4, and may be a water level sensor, but the type is not limited thereto.

The condenser water level controller is respectively and electrically connected with the condenser water level detection part, the frequency converter of the desalination pump unit 1 and the condenser water replenishing valve 21.

When the system is in the initial stage of unit start, namely the condenser 4 and the deaerator are both in the stage of water feeding, the condenser water level controller receives a condenser water feeding instruction fed back by the system. When the water level detection part detects that the water level of the condenser 4 is lower than the preset water level at the initial starting stage of the unit, the low water level instruction fed back by the condenser water level detection part is sent to a condenser water level controller, the condenser water level controller increases the rotating speed of a frequency converter of the desalting pump set 1 according to the received two instructions of the condenser water feeding instruction and the low water level instruction, the condenser water replenishing valve 21 is automatically opened, and the condenser water replenishing pipeline 2 automatically replenishes water for the condenser 4. Obviously, at the initial stage of the unit starting, when the water level of the condenser 4 is low, the water level in the condenser 4 can be adjusted by controlling the rotating speed of the frequency converter of the desalination pump unit 1. When the condenser water level detection part detects that the water level of the condenser 4 reaches the preset water level, a normal water level instruction fed back by the condenser water level detection part is sent to a condenser water level controller, the condenser water level controller reduces the rotating speed of a frequency converter of the desalting pump unit 1, the condenser water replenishing valve 21 is closed, and the condenser water replenishing pipeline 2 automatically stops replenishing water to the condenser 4.

The preset water level herein refers to the lowest water level of the condenser 4 during normal operation, and may be 800 mm.

When the system is in the normal operation state of the unit, namely after the condensing steam turbine generator driven by the condenser 4 is connected to the grid, the condenser water level controller receives a unit normal operation state instruction fed back by the system. When the unit normally operates, when the condenser water level detection part detects that the water level of the condenser 4 is higher than the preset water level, the high water level instruction fed back by the condenser water level detection part is sent to a condenser water level controller, the condenser water level controller increases the rotating speed of a frequency converter of the condensation pump set 5 according to the received two instructions of the unit normal operation state instruction and the high water level instruction, the condenser water replenishing valve 21 is closed, and the condensation pump set 5 automatically pumps redundant condensed water in the condenser 4 to a deaerator through a deaerator water feeding pipeline 6. Obviously, when the unit normally operates, the water level of the condenser 4 can be reduced by controlling the rotating speed of the frequency converter of the condensation pump group 5.

The invention also comprises a deaerator flow controller, a shaft seal heater 7, a condensate water circulating pipeline 8 and a deaerator flow detection piece.

The condensed water circulating pipeline 8 is connected between the shaft seal heater 7 and the condenser 4, the condensed water circulating pipeline 8 is provided with a condensed water circulating valve 81, and the flow of the condensed water circulating pipeline 8 is adjusted by adjusting the condensed water circulating valve 81.

The deaerator flow detecting piece is used for detecting the flow of the deaerator water replenishing pipeline 3, and can be a flowmeter.

When the deaerator flow detection piece detects that the flow of deaerator moisturizing pipeline 3 is less than preset flow, mean that the last water yield of boiler is less, low flow instruction to deaerator flow controller of deaerator flow detection piece feedback, deaerator flow controller is according to two instructions of the normal running state instruction of unit and the low flow instruction of receipt, control condensate water circulating valve 81 is automatic to be opened, the unnecessary condensate water of bearing seal heater 7 exhaust flows back to condenser 4 in through condensate water circulating pipeline 8, through the reposition of redundant personnel, can ensure that the deaerator has sufficient cooling water yield, can ensure again that condensate pump group 5 can maintain minimum flow, play the effect of protection condensate pump group 5. Obviously, when the unit is in normal operation, the cooling water amount of the deaerator can be controlled by controlling the on-off of the condensed water circulating valve 81.

The invention also comprises a deaerator water level controller, at least one deaerator branch pipeline 9 and at least one deaerator water level detection piece.

One end of each deaerator branch pipeline 9 is connected with the deaerator water feeding pipeline 6, and the other end of each deaerator branch pipeline 9 is connected with the deaerator, so that the deaerator water feeding pipeline 6 respectively supplies water to each deaerator through each deaerator branch pipeline 9. Each deaerator branch pipeline 9 is provided with a deaerator water level detection piece for detecting the water level of the deaerator on the deaerator branch pipeline 9, and the deaerator water level detection piece can be specifically a water level detector. In addition, each deaerator branch pipeline 9 is provided with a deaerator water feeding valve 91 respectively to control the flow of the deaerator branch pipeline 9.

When only one waste heat boiler normally operates, the system feeds back a normal operation state instruction of the single waste heat boiler to the deaerator water level controller; under this state, when one of them oxygen-eliminating device water level detection piece detects the water level of the oxygen-eliminating device that links to each other with it and appoints the water level inconsistent, this oxygen-eliminating device water level detection piece feeds back the unusual instruction of water level to the oxygen-eliminating device water level controller, two kinds of instructions of the normal operating condition instruction of single exhaust-heat boiler and the unusual instruction of water level are received to the oxygen-eliminating device water level controller, adjust the converter rotational speed of desalination pump package 1, and adjust the aperture of the water feeding valve 91 of the oxygen-eliminating device that corresponds to the biggest, reduce the pipeline resistance of oxygen-eliminating device branch pipeline 9, ensure that the oxygen-eliminating device is watered fast. The corresponding deaerator water feeding valve 91 is the deaerator water feeding valve 91 which is positioned on the same deaerator branch pipeline 9 with the deaerator water level detection piece for feeding back the water level abnormal instruction. The designated water level herein refers to the lowest water level at which the deaerator operates normally. Obviously, when the unit operates normally and only one waste heat boiler operates normally, the water level of the deaerator can be controlled by controlling the rotating speed of the frequency converter of the desalination pump unit 1.

Specifically, when the water level of the deaerator is higher than the specified water level, the deaerator water level controller reduces the rotating speed of a frequency converter of the desalting pump set 1, reduces the water feeding amount of the deaerator, and avoids the excessive water amount in the deaerator. When the water level of the deaerator is lower than the designated water level, the deaerator water level controller adjusts the rotating speed of a frequency converter of the desalting pump set 1 to increase the water feeding amount of the deaerator, and the situation that the water amount in the deaerator is too small is avoided.

Furthermore, the invention also comprises a main pipe pressure controller and a main pipe pressure detection piece, wherein the main pipe pressure detection piece is used for detecting the outlet main pipe pressure of the condensation pump group 5, and can be a pressure sensor specifically.

When at least one waste heat boiler normally operates, the system feeds back a normal operation state instruction of the plurality of waste heat boilers to the deaerator water level controller; under the state, when the pressure of the outlet main pipe of the condensation pump group 5 is detected by the main pipe pressure detection piece to be inconsistent with the preset pressure, the main pipe pressure detection piece feeds back a pressure abnormal instruction to the main pipe pressure controller, and the main pipe pressure controller adjusts the rotating speed of the frequency converter of the desalination pump group 1 according to the received normal operation state instructions and the pressure abnormal instructions of the plurality of waste heat boilers, so that the pressure of the outlet main pipe of the condensation pump group 5 is close to the preset pressure. The preset pressure refers to the normal liquid supply pressure of an outlet main pipe of the condensation pump group 5.

Specifically, when the pressure of the outlet main pipe of the condensation pump group 5 is greater than the preset pressure, the main pipe pressure controller reduces the rotating speed of the frequency converter of the desalination pump group 1, and the pressure of the outlet main pipe of the condensation pump group 5 is automatically reduced. When the pressure of the outlet main pipe of the condensation pump group 5 is smaller than the preset pressure, the main pipe pressure controller increases the rotating speed of the frequency converter of the desalination pump group 1, and the pressure of the outlet main pipe of the condensation pump group 5 is automatically increased.

In addition, under the state that there is at least one exhaust-heat boiler normal operating, when at least one oxygen-eliminating device water level detection piece detects the water level of the oxygen-eliminating device that links to each other with it and appoints the water level inconsistent, at least one oxygen-eliminating device water level detection piece feeds back the unusual order of water level to oxygen-eliminating device water level controller simultaneously, oxygen-eliminating device water level controller is according to many exhaust-heat boiler normal operating state orders and the unusual order of a plurality of water levels of receipt, the opening degree of the water valve 91 on the adjustment corresponding oxygen-eliminating device, and then the water level of adjustment oxygen-eliminating device, also be the water level of the oxygen-eliminating device on oxygen-eliminating device branch pipeline 9 of control place through the opening degree of water valve 91 on the oxygen-eliminating device. The corresponding deaerator water feeding valve 91 is the deaerator water feeding valve 91 which is positioned on the same deaerator branch pipeline 9 with the deaerator water level detection piece for feeding back the water level abnormal instruction. Obviously, when the unit operates normally and at least one waste heat boiler operates normally, the water level of the deaerator can be controlled by controlling the pressure of the outlet main pipe of the condensation pump unit 5 or the rotating speed of the frequency converter of the desalination pump unit 1.

Referring to fig. 2, fig. 2 is a flowchart illustrating a method for controlling water supply to a heat supply unit according to an embodiment of the present invention.

The invention provides a water supplementing control method for a heat supply unit, which comprises the following steps:

in the initial stage of starting a unit, a condenser water level controller receives a condenser water feeding instruction;

the condenser water level detection piece detects whether the water level of the condenser 4 is lower than a preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of the desalination pump unit 1 and opens a condenser water replenishing valve 21 according to a received condenser water feeding instruction and a low water level instruction fed back by the condenser water level detection piece;

when the unit normally operates, the condenser water level controller receives a normal operation state instruction of the unit;

the condenser water level detection piece detects whether the water level of the condenser 4 is higher than a preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of the condensation pump unit 5 and closes a condenser water replenishing valve 21 according to a received normal operation state instruction of the unit and a high water level instruction fed back by the condenser water level detection piece, and the condensation pump unit 5 automatically pumps redundant condensed water in the condenser 4 to a deaerator through a deaerator water feeding pipeline 6;

when the unit normally operates, the deaerator flow controller receives a normal operation state instruction of the unit;

when the deaerator flow detection piece detects whether the flow of the deaerator water replenishing pipeline 3 is lower than the preset flow, if so, the deaerator flow controller controls the condensed water circulation valve 81 to be automatically opened according to the received unit normal running state instruction and the low flow instruction fed back by the deaerator flow detection piece.

The invention provides a water supplementing control method for a heat supply unit, which comprises the following steps:

when the unit normally operates, the deaerator water level controller receives the unit normal operation state instruction;

the deaerator water level controller judges whether only one waste heat boiler normally operates, if so, the deaerator water level controller adjusts the rotating speed of a frequency converter of the desalting pump unit 1 and simultaneously adjusts the opening degree of a corresponding deaerator water feeding valve 91 to be maximum according to a received single waste heat boiler normal operation state instruction and a water level abnormal instruction fed back by a deaerator water level detection piece;

if not, the main pipe pressure detection piece detects whether the pressure of an outlet main pipe of the condensation pump group 5 is inconsistent with the preset pressure, and if not, the main pipe pressure controller adjusts the rotating speed of a frequency converter of the desalination pump group 1 according to the received normal operation state instructions of the waste heat boilers and the pressure abnormal instruction fed back by the main pipe pressure detection piece; and simultaneously, the deaerator water level controller adjusts the opening degree of the corresponding deaerator water feeding valve 91 according to the received normal operation state instruction of the plurality of waste heat boilers and the water level abnormal instruction fed back by the at least one deaerator water level detection piece to adjust the water level of the deaerator.

The water replenishing control method for the heat supply unit has the same beneficial effects.

The above detailed description is made on the water replenishing control system of the heat supply unit provided by the invention, and the principle and the implementation mode of the invention are explained by applying a specific example, and the description of the above embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims (9)

1. The utility model provides a heat supply unit moisturizing control system, its characterized in that, including condensation pump package (5), through oxygen-eliminating device water feeding pipeline (6) with the oxygen-eliminating device that condensation pump package (5) link to each other, with oxygen-eliminating device water feeding pipeline (3) that the female pipe in export of condensation pump package (5) links to each other, the demineralized water warp of oxygen-eliminating device water feeding pipeline (3) supply through oxygen-eliminating device water feeding pipeline (6) directly supply extremely the oxygen-eliminating device.

2. The heat supply unit water replenishing control system according to claim 1, further comprising a condenser water level controller, a desalination pump unit (1), a condenser (4), a condenser water replenishing pipeline (2) connected between the desalination pump unit (1) and the condenser (4), and a condenser water level detection element for detecting the water level of the condenser (4), wherein the condenser water replenishing pipeline (2) is provided with a condenser water replenishing valve (21);

when the condenser water level detection element detects that the water level of the condenser (4) is lower than a preset water level, the condenser water level controller increases the rotating speed of a frequency converter of the desalting pump set (1) according to a received condenser water feeding instruction and a low water level instruction fed back by the condenser water level detection element and simultaneously opens the condenser water replenishing valve (21), and the desalted water supplied by the desalting pump set (1) is replenished to the condenser (4) through the condenser water replenishing pipeline (2).

3. The heating unit water supply control system according to claim 2, characterized in that the desalination pump unit (1) comprises at least one desalination water supply line, each desalination water supply line comprising a desalination water pump (12), a desalination outlet valve (14) and a desalination check valve (13) arranged between the desalination water pump (12) and the desalination outlet valve (14).

4. The heating unit water replenishing control system according to claim 2, wherein when the condenser water level detection element detects that the water level of the condenser (4) is higher than the preset water level, the condenser water level controller increases the rotating speed of a frequency converter of the condenser pump unit (5) and closes the condenser water replenishing valve (21) according to a received unit normal operation state instruction and a high water level instruction fed back by the condenser water level detection element, and the condenser pump unit (5) pumps redundant condensed water in the condenser (4) to the deaerator through the deaerator water feeding pipeline (6).

5. The heating unit water replenishing control system according to claim 2, further comprising a deaerator flow controller, a shaft seal heater (7), a condensed water circulation pipeline (8) connected between the shaft seal heater (7) and the condenser (4), and a deaerator flow detection piece for detecting the flow of the deaerator water replenishing pipeline (3), wherein the condensed water circulation pipeline (8) is provided with a condensed water circulation valve (81);

when the deaerator flow detection piece detects that the flow of the deaerator water replenishing pipeline (3) is lower than the preset flow, the deaerator flow controller opens the condensed water circulating valve (81) according to the received normal running state instruction of the unit and a low flow instruction fed back by the deaerator flow detection piece, and redundant condensed water discharged by the shaft seal heater (7) flows back to the condenser (4) through the condensed water circulating pipeline (8).

6. The water replenishing control system of the heat supply unit according to claim 2, further comprising a deaerator water level controller, at least one deaerator branch pipeline (9) respectively connected to the deaerator water supply pipeline (6), and at least one deaerator water level detecting piece respectively arranged on the deaerator branch pipelines (9) in a one-to-one correspondence manner and used for detecting the water level of the deaerator on the deaerator branch pipelines (9), wherein each deaerator branch pipeline (9) is provided with a deaerator water supply valve (91);

when one of them the oxygen-eliminating device water level detection piece detects that it links to each other the water level of oxygen-eliminating device is inconsistent with appointed water level, oxygen-eliminating device water level controller is according to the normal operating condition instruction of single exhaust-heat boiler who receives and the abnormal instruction adjustment of water level of oxygen-eliminating device water level detection piece feedback the converter rotational speed of desalination pump package (1) and will correspond simultaneously the aperture of oxygen-eliminating device water feeding valve (91) is transferred to the biggest.

7. The water replenishing control system of the heat supply unit according to claim 6, further comprising a main pipe pressure controller and a main pipe pressure detecting element for detecting the pressure of the outlet main pipe of the condensation pump group (5), wherein when the main pipe pressure detecting element detects that the pressure of the outlet main pipe of the condensation pump group (5) is inconsistent with a preset pressure, the main pipe pressure controller adjusts the rotation speed of the frequency converter of the desalination pump group (1) according to the received normal operation state instructions of the plurality of waste heat boilers and the pressure abnormal instruction fed back by the main pipe pressure detecting element; and meanwhile, the deaerator water level controller adjusts the opening degree of the corresponding deaerator water feeding valve (91) according to the received normal operation state instruction of the plurality of waste heat boilers and the water level abnormal instruction fed back by the deaerator water level detection piece to adjust the water level of the deaerator.

8. A heat supply unit water supplementing control method is applied to the heat supply unit water supplementing control system of any one of claims 1 to 7, and comprises the following steps:

the condenser water level detection element detects whether the water level of the condenser is lower than a preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of the desalting pump set and opens a condenser water replenishing valve according to the received condenser water feeding instruction and a low water level instruction fed back by the condenser water level detection element;

the condenser water level detection part detects whether the water level of the condenser is higher than the preset water level, if so, the condenser water level controller increases the rotating speed of a frequency converter of a condensation pump set and closes a water replenishing valve of the condenser according to a received normal running state instruction of the unit and a high water level instruction fed back by the condenser water level detection part, and the condensation pump set pumps redundant condensed water in the condenser to a deaerator through a deaerator water charging pipeline;

and detecting by a deaerator flow detection piece that the flow of the deaerator water replenishing pipeline is lower than a preset flow, and if so, opening the condensed water circulating valve by the deaerator flow controller according to the received unit normal operation state instruction and the low flow instruction fed back by the deaerator flow detection piece.

9. The heating unit water supplementing control method according to claim 8, characterized by further comprising the steps of:

a deaerator water level controller receives the instruction of the normal running state of the unit;

the deaerator water level controller judges whether only one waste heat boiler normally operates, if so, the deaerator water level controller adjusts the rotating speed of a frequency converter of the desalting pump set according to a received normal operation state instruction of the single waste heat boiler and a water level abnormal instruction fed back by a deaerator water level detection piece and simultaneously adjusts the opening of a corresponding deaerator water feeding valve to be maximum; if not, the main pipe pressure detection piece detects whether the pressure of an outlet main pipe of the condensation pump group is inconsistent with a preset pressure, and if not, the main pipe pressure controller adjusts the rotating speed of a frequency converter of the desalination pump group according to a received normal operation state instruction of the waste heat boilers and a pressure abnormal instruction fed back by the main pipe pressure detection piece; and simultaneously, the deaerator water level controller adjusts the opening degree of the corresponding deaerator water feeding valve according to the received normal operation state instruction of the plurality of waste heat boilers and the water level abnormal instruction fed back by the deaerator water level detection piece to adjust the water level of the deaerator.

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