CN214173012U - Condensate fine treatment system - Google Patents
Condensate fine treatment system Download PDFInfo
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- CN214173012U CN214173012U CN202023093088.6U CN202023093088U CN214173012U CN 214173012 U CN214173012 U CN 214173012U CN 202023093088 U CN202023093088 U CN 202023093088U CN 214173012 U CN214173012 U CN 214173012U
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Abstract
The utility model discloses a condensate polishing system, mainly include polishing system, recirculation system and keep apart and overhaul the pipeline, polishing system is connected with the condenser hot-well and carries out polishing with condenser hot-well exhaust condensate, keep apart and overhaul the both ends of pipeline and be connected with condenser hot-well and condensate system respectively and be used for keeping apart the maintenance to polishing system and recirculation system, polishing system's water outlet end and keep apart and overhaul the pipeline and be connected and through keeping apart and overhaul the pipeline with the condensate water after polishing to the condensate system, recirculation system is connected with polishing system and circulates the condensate water to the condenser hot-well; a condensate pump for ensuring that the condensate has enough pressure to enter a condensate system is arranged on the isolation maintenance pipeline, and an inlet pipeline and an outlet pipeline of the condensate pump are respectively provided with an electric isolation valve; the novel water pump has the characteristics of small lift, low power consumption, capability of shortening starting time, saving a large amount of condensed water and the like.
Description
Technical Field
The utility model relates to a thermal power factory designs technical field, concretely relates to condensate polishing system.
Background
The condensate fine treatment system is an indispensable auxiliary system for steam-water circulation of a large thermal generator set (comprising a coal-fired power plant and a gas-steam combined cycle power plant). In China, all once-through boilers and most unit drum boilers of 300MW and above in a coal-fired power station are provided with condensate polishing systems, and steam turbines and waste heat boilers of a 9F grade and above gas-steam combined cycle power station are also provided with condensate polishing systems. The safe and stable operation of the system can ensure the subsequent water supply quality, and prevent the steam-water systems of the boiler/waste heat boiler and the steam turbine from being polluted. The system has the following specific functions: 1. the condensed water fine processing pump system can enable the water vapor system to run cleanly, and can remove corrosion products of the thermodynamic system equipment pipeline when the unit runs; 2. removing trace impurity ions leaked by the condenser; 3. it can shorten the starting time of the unit and save a large amount of condensed water.
At present, a condensate fine treatment system for steam-water circulation of a coal-fired power station and a gas-steam combined cycle power station is generally arranged at an outlet of a condensate pump, the fine treatment system is required to bear higher pressure, resin is crushed and abraded greatly, the requirement on the quality of the resin is higher, and the investment and the operating cost are higher.
Disclosure of Invention
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provide a condensate polishing system that operating pressure is littleer, resin wear rate is lower.
The utility model aims at completing through the following technical scheme, a condensate polishing system mainly comprises a polishing system, a recycling system and an isolation and maintenance pipeline, wherein the polishing system is connected with a condenser hot well and polishes condensate discharged from the condenser hot well, two ends of the isolation and maintenance pipeline are respectively connected with the condenser hot well and the condensate system to be used for isolating and maintaining the polishing system and the recycling system, a water outlet end of the polishing system is connected with the isolation and maintenance pipeline and discharges the condensate after polishing to the condensate system through the isolation and maintenance pipeline, and the recycling system is connected with the polishing system and circulates the condensate into the condenser hot well; the isolation maintenance pipeline is provided with a condensate pump for ensuring that the condensate has enough pressure to enter a condensate system, and the inlet and outlet pipelines of the condensate pump are respectively provided with an electric isolation valve.
Furthermore, the recycling system comprises a main recycling system and a standby recycling system which are arranged in parallel, and the isolation overhaul pipeline comprises a main isolation overhaul pipeline and a standby isolation overhaul pipeline which are arranged in parallel; the precision processing system mainly comprises a first connecting pipeline and a second connecting pipeline which are connected in parallel, a condensate precision processing device is arranged at the water outlet ends of the first connecting pipeline and the second connecting pipeline through a sealing water system, the water outlet end of the condensate precision processing device is respectively connected with a main isolation and maintenance pipeline and a standby isolation and maintenance pipeline through a connecting pipeline provided with a flowmeter and an outlet regulating valve, and an electric valve gate is arranged on the connecting pipeline.
Furthermore, the first connecting pipeline and the second connecting pipeline respectively comprise a filter, a fine processing booster pump and an automatic recirculation check valve which are sequentially connected, and electric isolating valves are respectively arranged on an inlet pipeline of the filter and an outlet pipeline of the automatic recirculation check valve; the main recirculation system and the standby recirculation system are respectively connected with the automatic recirculation check valves of the first connecting pipeline and the second connecting pipeline.
Furthermore, the main recycling system and the standby recycling system respectively comprise an electric isolating valve, a flowmeter and a single-stage orifice plate which are sequentially connected, and the outlet end of the single-stage orifice plate is connected with the water return end of the condenser hot well through a pipeline.
The utility model has the advantages of: compared with the prior art, the condensate pump in the system does not bear the design pressure drop of the fine treatment device, has small lift and low power consumption, can shorten the starting time, saves a large amount of condensate water, and can reduce the operating cost to a certain extent; when the pumping capacity of the condensate pump is larger than the treated water capacity of the condensate fine treatment system, the insufficient water capacity is directly supplied by the condenser hot well, otherwise, the redundant treated water returns to the condenser hot well to participate in recirculation, the condensate pump and the fine treatment booster pump are not interfered with each other, the control system is simple, the capacity (or flow) of the fine treatment booster pump does not need to be matched with the capacity (or flow) of the condensate pump, and the condensate pump has longer service life and higher economic benefit.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings and examples.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "lateral", "vertical", and the like are the directions or positional relationships shown in the drawings, and are only for convenience of description of the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, and therefore, should not be construed as limiting the present invention.
As shown in fig. 1, a condensate polishing system mainly includes polishing system 1, recirculation system 2 and isolation and maintenance pipeline 3, polishing system 1 is connected with condenser hot-well 4 and carries out polishing treatment with condenser hot-well 4 exhaust condensate, condenser hot-well 4 is used for gathering the condensate, is favorable to condensate pump (one is used for one and is equipped with) normal operating, the both ends of isolating and maintaining pipeline 3 are connected with condenser hot-well 3 and condensate system respectively and are used for isolating and maintaining polishing system 1 and recirculation system 2, the delivery end of polishing system 1 is connected with isolation and maintenance pipeline 3 and through isolating and maintaining pipeline 3 with the condensate after polishing treatment to the condensate system, recirculation system 2 is connected with polishing system 1 and circulates the condensate to condenser hot-well 4; the isolating and overhauling pipeline 3 is provided with a condensate pump 31 for ensuring that the condensate has enough pressure to enter a condensate system, and the inlet and outlet pipelines of the condensate pump 31 are respectively provided with an electric isolating valve 5.
Referring to fig. 1, the recirculation system 2 includes a main recirculation system 21 and a standby recirculation system 22 arranged in parallel, and the isolation overhaul pipeline 3 includes a main isolation overhaul pipeline 31 and a standby isolation overhaul pipeline 32 arranged in parallel; the precision processing system 1 mainly comprises a first connecting pipeline 11 and a second connecting pipeline 12 which are arranged in parallel, a condensate precision processing device 7 is arranged at the water outlet ends of the first connecting pipeline 11 and the second connecting pipeline 12 through a sealing water system 6, the water outlet end of the condensate precision processing device 7 is respectively connected with a main isolation and maintenance pipeline 31 and a standby isolation and maintenance pipeline 32 through connecting pipelines provided with a flow meter 8 and an outlet regulating valve 9, and an electric valve gate 10 is arranged on the connecting pipelines.
Referring to fig. 1, each of the first connecting pipeline 11 and the second connecting pipeline 12 includes a filter 13, a fine processing booster pump 14, and an automatic recirculation check valve 15, which are connected in sequence, an inlet pipeline of the filter 13 and an outlet pipeline of the automatic recirculation check valve 15 are both provided with an electric isolation valve 5, and the electric isolation valve 5 on the inlet pipeline of the filter 13 is provided with a pressure relief valve 16; the filter 13 is used for removing impurities, and ensures normal operation of the pump, and the precision processing booster pump 14 is arranged behind the filter 13 and used for improving the pressure of condensed water in a pipeline, overcoming the resistance automatic recirculation check valve of the condensed water precision processing device and installing the check valve on a water outlet pipe of the precision processing booster pump, and ensuring the minimum flow of the pump. If the condensate flow to the condensate polishing system is too low, the minimum flow from each polishing booster pump is returned to the condenser hot well through an automatic recirculation check valve. The primary recirculation system 21 and the backup recirculation system 22 are connected to the automatic recirculation check valves 15 of the first connection line 11 and the second connection line 12, respectively. The main recirculation system 11 and the standby recirculation system 12 both comprise an electric isolation valve 5, a flowmeter 8 and a single-stage orifice plate 13 which are connected in sequence, and the outlet end of the single-stage orifice plate 13 is connected with the water return end of the condenser hot well 4 through a pipeline.
Each electric isolation valve in the system is respectively arranged on an inlet pipe and an outlet pipe of the fine treatment booster pump and a recirculation pipe and is used for isolating and overhauling the fine treatment booster pump and ensuring the normal operation of the other pump; the pressure relief valve is arranged on an inlet pipe of the precision processing booster pump, when an automatic recirculation check valve of the standby precision processing booster pump leaks and the inlet valve of the pump is closed, the pressure relief valve can avoid overpressure of a suction pipeline, the flowmeter is arranged on a recirculation pipe of the precision processing booster pump, and an alarm is given when the flow of the pipeline is lower than the minimum recirculation flow of-330 m 3/h; the single-stage orifice plate is used for reducing the pressure of condensed water entering the hot well; the sealing water system is arranged on an outlet pipeline of the fine treatment booster pump to prevent condensed water of the system from leaking; the condensed water fine treatment device is arranged on an outlet main pipe of the fine treatment booster pump, so that the clean operation of a water vapor system is ensured; the flowmeter is arranged on the outlet pipe of the fine treatment system, when the outlet flow of the condensate fine treatment pump is increased to 1380m3/h, the flowmeter of the main pipe at the outlet of the fine treatment system sends an alarm to DCS, if the outlet flow of the condensate fine treatment pump reaches 1400m3/h, the electric gate valve is closed, the specific value needs to be debugged on site to determine that the outlet regulating valve is arranged on the outlet pipe of the condensate fine treatment system, and the outlet regulating valve is regulated by a flow meter of the condensate pump which outputs water to the waste heat boiler; install the electronic isolating valve at every condensate pump's entry and outlet side respectively, keep apart when the power plant operation and overhaul the pump, guarantee another pump normal operating.
During the priming phase, the pump suction lines of the polishing booster pump and the recirculation check valve are placed below the condenser level, which can be filled and maintained in operation. The electronic isolating valve of fine processing booster pump entry is normally opened, closes when the pump overhauls. The outlet pipe of the fine treatment booster pump is filled with a sealed water system, and only when the pipeline system needs to be emptied, the emptying valve can be manually opened. A permanent exhaust valve is arranged at the inlet of each fine treatment booster pump and returns to the condenser, and a system from the outlet of the condensate fine treatment pump to an electric isolating valve of the condensate pump needs to be filled by a sealing water system. After manual exhaust and after completion of confirmation, the finishing booster pumps can be started for standby, and if both finishing booster pumps are stopped, the electric isolation valves should be closed. The fine processing system is shut down, and the electric isolating valve is also in a closed state. Before the condensate polishing system runs, the electric valve at the inlet of the condensate pump is isolated and closed, and the condensate polishing pump and the condensate polishing system need to be filled with water.
And in the starting stage, the exhaust of the suction side of the condensate polishing pump is finished and the condensate polishing pump is filled with water, an outlet pipeline of the polishing booster pump is respectively connected with a sealing water system, and the system keeps filling and exhausting during the shutdown period so as to keep the system started at any time. Before the condensate pump is started, the liquid level of the hot well of the condenser reaches a certain value, and the starting requirement is met. Before the condensate polishing pump is started, an electric isolation valve is opened and closed; then starting the pre-pump for fine treatment, and returning the condensed water at the outlet of the pump to the condenser through an automatic recirculation check valve; when the flow is further increased and the outlet pressure of the fine treatment preposed pump reaches a certain value, the electric isolating valve is opened.
And in the operation stage, the condensate of the hot well of the condenser enters a condensate fine treatment device after passing through a fine treatment booster pump, then enters an inlet of a main condensate pump after passing through a flow meter and an adjusting valve, and is sent to the waste heat boiler after being boosted by the main condensate pump.
The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.
Claims (4)
1. A condensate polishing system is characterized in that: the system mainly comprises a fine treatment system, a recirculation system and an isolation and maintenance pipeline, wherein the fine treatment system is connected with a condenser hot well and is used for performing fine treatment on condensed water discharged by the condenser hot well, two ends of the isolation and maintenance pipeline are respectively connected with the condenser hot well and the condensed water system and are used for performing isolation and maintenance on the fine treatment system and the recirculation system, a water outlet end of the fine treatment system is connected with the isolation and maintenance pipeline and is used for discharging the condensed water after the fine treatment to the condensed water system through the isolation and maintenance pipeline, and the recirculation system is connected with the fine treatment system and is used for circulating the condensed water into the condenser hot well; the isolation maintenance pipeline is provided with a condensate pump for ensuring that the condensate has enough pressure to enter a condensate system, and the inlet and outlet pipelines of the condensate pump are respectively provided with an electric isolation valve.
2. The condensate polishing system of claim 1, wherein: the recycling system comprises a main recycling system and a standby recycling system which are arranged in parallel, and the isolation overhaul pipeline comprises a main isolation overhaul pipeline and a standby isolation overhaul pipeline which are arranged in parallel; the precision processing system mainly comprises a first connecting pipeline and a second connecting pipeline which are connected in parallel, a condensate precision processing device is arranged at the water outlet ends of the first connecting pipeline and the second connecting pipeline through a sealing water system, the water outlet end of the condensate precision processing device is respectively connected with a main isolation and maintenance pipeline and a standby isolation and maintenance pipeline through a connecting pipeline provided with a flowmeter and an outlet regulating valve, and an electric valve gate is arranged on the connecting pipeline.
3. The condensate polishing system of claim 2, wherein: the first connecting pipeline and the second connecting pipeline respectively comprise a filter, a fine processing booster pump and an automatic recirculation check valve which are sequentially connected, and electric isolating valves are respectively arranged on an inlet pipeline of the filter and an outlet pipeline of the automatic recirculation check valve; the main recirculation system and the standby recirculation system are respectively connected with the automatic recirculation check valves of the first connecting pipeline and the second connecting pipeline.
4. The condensate polishing system according to claim 2 or 3, wherein: the main recycling system and the standby recycling system respectively comprise an electric isolating valve, a flowmeter and a single-stage throttle orifice plate which are sequentially connected, and the outlet end of the single-stage throttle orifice plate is connected with the water return end of the condenser hot well through a pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023093088.6U CN214173012U (en) | 2020-12-21 | 2020-12-21 | Condensate fine treatment system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023093088.6U CN214173012U (en) | 2020-12-21 | 2020-12-21 | Condensate fine treatment system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214173012U true CN214173012U (en) | 2021-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023093088.6U Active CN214173012U (en) | 2020-12-21 | 2020-12-21 | Condensate fine treatment system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214173012U (en) |
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2020
- 2020-12-21 CN CN202023093088.6U patent/CN214173012U/en active Active
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