CN219734994U

CN219734994U - Pipeline drainage system

Info

Publication number: CN219734994U
Application number: CN202321212444.2U
Authority: CN
Inventors: 李国盛; 王宗宇; 王传金
Original assignee: Huaneng Fujian Energy Development Co Ltd Fuzhou Branch
Current assignee: Huaneng Fujian Energy Development Co Ltd Fuzhou Branch
Priority date: 2023-05-18
Filing date: 2023-05-18
Publication date: 2023-09-22
Anticipated expiration: 2033-05-18

Abstract

The utility model relates to a pipeline drainage system which comprises a high-pressure cylinder, a high-pressure cylinder exhaust pipe, a high-pressure cylinder ventilation pipe, a high-pressure cylinder drainage pipe and a connecting pipe, wherein the high-pressure cylinder exhaust pipe is directly connected with the high-pressure cylinder; the high-pressure cylinder drainage pipe is provided with a first gate valve, a second gate valve, an automatic drainage device and a drainage pneumatic valve, wherein the first gate valve, the automatic drainage device and the second gate valve are sequentially connected in series from top to bottom and then connected with the drainage pneumatic valve in parallel; temperature measuring elements are arranged on valve rear pipelines of the drainage pneumatic valves of each unit, and all the temperature measuring elements are connected to a display module in a control room and respectively display real-time data.

Description

Pipeline drainage system

Technical Field

The utility model relates to a pipeline drainage system, and belongs to the technical field of pipeline drainage.

Background

In daily operation, the drain pipeline directly enters the condenser before the ventilation valve, so that high-quality steam enters the condenser due to internal leakage of the valve of the drain pipeline, heat loss is caused, and operation economy is affected. And because the valve leaks in the long term, the valve maintenance workload is increased, and the manpower maintenance cost is increased. Therefore, the transformation is needed urgently.

According to the calculation of the related parameters, the drainage operation parameters before the high-pressure cylinder steam exhaust check valve are basically consistent with drainage before the ventilation valve, and the two pipelines are adjacent, for example, the two pipelines are combined into one path, namely, the drainage pipeline before the ventilation valve is connected to the drainage pneumatic valve before the high-pressure cylinder steam exhaust check valve, so that the drainage mode of the pipeline can be improved.

Steam leakage is acceptable in a certain range, and the earlier the leakage is found to be, the smaller the loss is after the threshold is exceeded, and the higher the economical efficiency of operation is.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a pipeline drainage system.

The technical scheme of the utility model is as follows:

the high-pressure cylinder vent pipe and the high-pressure cylinder drain pipe are respectively connected with the high-pressure cylinder vent pipe, and the high-pressure cylinder vent pipe and the high-pressure cylinder drain pipe are connected through a connecting pipe; the high-pressure cylinder drainage pipe is provided with a first gate valve, a second gate valve, an automatic drainage device and a drainage pneumatic valve, wherein the first gate valve, the automatic drainage device and the second gate valve are sequentially connected in series from top to bottom and then connected with the drainage pneumatic valve in parallel; temperature measuring elements are arranged on valve rear pipelines of the drainage pneumatic valves of each unit, and all the temperature measuring elements are connected to a display module in a control room and respectively display real-time data.

In a preferred embodiment, the high-pressure cylinder exhaust pipe is provided with a high-pressure exhaust check valve with a manual control device.

As a preferred embodiment, a vent valve is provided on the high pressure cylinder vent pipe.

In a preferred embodiment, the temperature measuring element is a conventional thermocouple or a thermistor.

The automatic control unit is independent of the manual control unit, and the corresponding automatic control unit immediately stops running when the manual control unit is started.

The utility model has the following beneficial effects:

1. compared with the original drainage system, the drainage pipeline in front of the ventilation valve and the exhaust check valve is connected together, so that the number of relevant valves required by the drainage pipeline is reduced, leakage points caused by internal leakage of the valves are reduced, heat loss is reduced, and fuel cost is reduced.

2. Because the valve is required to be maintained regularly in long-term internal leakage, the reduction of the valve quantity represents that the cost of manpower maintenance is reduced, and higher economic benefit is obtained.

3. All valves can be controlled automatically or manually, and are safer and more convenient, meanwhile, the temperature change can be detected in real time through the temperature measuring element behind the drain valve, whether leakage at the drain valve side exceeds a threshold value or not can be found, and the leakage position can be accurately positioned and repaired in time.

Drawings

FIG. 1 is a modified pipeline drainage system;

FIG. 2 is a diagram of a pipeline drainage system prior to retrofitting;

the reference numerals in the drawings are as follows:

1. a high-pressure cylinder; 2. a high-pressure cylinder exhaust pipe; 3. a high pressure cylinder ventilation pipe; 4. a high-pressure cylinder drain pipe; 5. a connecting pipe; 6. a high pressure exhaust check valve; 7. a first gate valve; 8, a second gate valve; 9. an automatic steam trap; 10. a hydrophobic pneumatic valve; 11. a temperature measuring element; 12. and a control room.

Detailed Description

The utility model will now be described in detail with reference to the drawings and to specific embodiments.

As shown in fig. 1, the pipeline drainage system of the embodiment comprises a high-pressure cylinder 1, a high-pressure cylinder exhaust pipe 2, a high-pressure cylinder exhaust pipe 3, a high-pressure cylinder drainage pipe 4 and a connecting pipe 5, wherein the high-pressure cylinder exhaust pipe 2 is directly connected with the high-pressure cylinder 1, the high-pressure cylinder exhaust pipe 3 and the high-pressure cylinder drainage pipe 4 are respectively connected with the high-pressure cylinder exhaust pipe 2, and the high-pressure cylinder exhaust pipe 3 and the high-pressure cylinder drainage pipe 4 are connected through the connecting pipe 5; the high-pressure cylinder drainage pipe 4 is provided with a first gate valve 7, a second gate valve 8, an automatic drainage device 9 and a drainage pneumatic valve 10, wherein the first gate valve 7, the automatic drainage device 9 and the second gate valve 8 are sequentially connected in series from top to bottom and then connected with the drainage pneumatic valve 10 in parallel; temperature measuring elements 11 are arranged on the valve rear pipelines of the drainage pneumatic valves 10 of each unit, and all the temperature measuring elements 11 are connected to a display module in the control room 12 and respectively display real-time data.

In the implementation, fig. 2 is a pipeline drainage system before modification, compared with the pipeline drainage system after modification in fig. 1, the drainage pipeline of each high-pressure cylinder 1 can be reduced by one relevant valve, the valve number reduced by a plurality of units is considerable, and the operation cost can be reduced considerably each year.

The automatic steam trap 9 and the steam trap pneumatic valve 10 on the high-pressure cylinder drain pipe 4 play a role in continuously discharging condensed water in the steam heating pipeline to the outside of the pipeline and automatically draining the condensed water.

The temperature fed back by all the temperature measuring elements is displayed on a display module in a control room in a centralized manner, each temperature measuring element tests the temperature change of the drain valve at one position, the leakage degree of all the drain valves is monitored according to real-time data, a threshold value is set, and when the leaked steam is larger than the threshold value, an alarm is automatically given.

As a preferred embodiment of the present embodiment, the high-pressure cylinder exhaust pipe 2 is provided with a high-pressure exhaust check valve 6 with a manual control device.

In practice, the return of steam to the high-pressure cylinder 1 is prevented, and the operation is generally automatic, but can be controlled manually as required.

As a preferred embodiment of the present embodiment, a vent valve is provided in the cylinder vent pipe 3.

In the concrete implementation, the ventilation valve has two functions, namely, when the medium pressure cylinder is started, the high pressure cylinder 1 should be vacuumized; and secondly, after the steam turbine trips, a ventilation valve is opened, residual steam of the high-pressure cylinder 1 is rapidly discharged to a condenser, and when the steam turbine has high rotating speed and low steam flow, blast friction heat generated by long blades at the tail part of the high-pressure cylinder is taken away, so that a measure of high-discharge overtemperature is prevented.

As a preferred implementation manner of this embodiment, the temperature measuring element is a common thermocouple or a thermistor.

In the concrete implementation, a common thermocouple is generally selected as a temperature measuring element, and thermocouples of different types and protection pipes are selected according to the required temperature measuring range and the environment.

As a preferred implementation of this embodiment, the present utility model further includes a control module located in the control room 12, where the control module includes an automatic control unit and a manual control unit, and the exhaust check valve 6, the ventilation valve, and the hydrophobic pneumatic valve 10 are respectively electrically connected to the automatic control unit and the manual control unit, where the automatic control unit is relatively independent from the manual control unit, and when the manual control unit is started, the corresponding automatic control unit immediately stops running.

In the specific implementation, all valves are automatically controlled by an automatic control unit according to a control plan during daily monitoring, when faults or conditions occur, the manual control unit can be started, an automatic control system corresponding to the valves is invalid, and after the manual control unit is stopped, the automatic control unit is restarted and continues to work according to the control plan.

The working principle of the utility model is as follows:

the drainage pipeline in front of the original ventilation valve and the drainage pipeline in front of the high-pressure check valve are combined together, so that the common drainage of the two paths of exhaust pipelines is realized, the valve number of a pipeline drainage system is reduced, and the heat loss and the running cost of the whole system are reduced; meanwhile, the real-time monitoring of the steam leakage degree of the drain valve is realized according to the temperature measuring element behind the drain valve, and faults are found and solved in time; the effective control of all valves is realized by reasonable use of the automatic control unit and the manual control unit.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims

1. The pipeline drainage system is characterized by comprising a high-pressure cylinder (1), a high-pressure cylinder exhaust pipe (2), a high-pressure cylinder ventilation pipe (3), a high-pressure cylinder drainage pipe (4) and a connecting pipe (5), wherein the high-pressure cylinder exhaust pipe (2) is directly connected with the high-pressure cylinder (1), the high-pressure cylinder ventilation pipe (3) and the high-pressure cylinder drainage pipe (4) are respectively connected with the high-pressure cylinder exhaust pipe (2), and the high-pressure cylinder ventilation pipe (3) and the high-pressure cylinder drainage pipe (4) are connected through the connecting pipe (5); the high-pressure cylinder drainage pipe (4) is provided with a first gate valve (7), a second gate valve (8), an automatic drainage device (9) and a drainage pneumatic valve (10), and the first gate valve (7), the automatic drainage device (9) and the second gate valve (8) are sequentially connected in series from top to bottom and then are connected with the drainage pneumatic valve (10) in parallel; temperature measuring elements (11) are arranged on valve rear pipelines of the drainage pneumatic valves (10) of each unit, and all the temperature measuring elements (11) are connected to a display module in a control room (12) and respectively display real-time data.

2. A pipe drainage system according to claim 1, characterized in that the high-pressure cylinder exhaust pipe (2) is provided with a high-pressure exhaust non-return valve (6) with manual control means.

3. A pipe drainage system according to claim 1, characterized in that the high-pressure cylinder ventilation pipe (3) is provided with a ventilation valve.

4. A plumbing hydrophobic system according to claim 1, wherein said temperature sensing element is a conventional thermocouple or thermistor.

5. A pipeline drainage system according to claim 2, further comprising a control module located in the control room (12), wherein the control module comprises an automatic control unit and a manual control unit, the exhaust check valve (6), the ventilation valve and the drainage pneumatic valve (10) are respectively electrically connected with the automatic control unit and the manual control unit, the automatic control unit is relatively independent from the manual control unit, and the corresponding automatic control unit immediately stops running when the manual control unit is started.