CN214571692U

CN214571692U - Ascending pipe waste heat recovery pressure stabilizing system

Info

Publication number: CN214571692U
Application number: CN202120293786.6U
Authority: CN
Inventors: 汪琴; 沈华军; 于鑫; 刘建成; 黄晓锋
Original assignee: Jiangsu Longye Energy Saving Technology Co ltd
Current assignee: Jiangsu Longye Energy Saving Technology Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-11-02
Anticipated expiration: 2031-02-02

Abstract

The utility model discloses a riser waste heat recovery and pressure stabilization system, which comprises an electric regulating valve, wherein the electric regulating valve is connected between a steam distributing cylinder and a steam pipe network in a riser waste heat recovery system, and a remote pressure gauge is arranged on a pipeline between the electric regulating valve and the steam distributing cylinder in the riser waste heat recovery system; the remote transmission pressure gauge is electrically connected with the input end of the PID controller, and the output end of the PID controller is electrically connected with the electric regulating valve. The utility model discloses the work of electrical control valve is controlled to preset setting value comparative result in drum pressure value and the PID controller that record according to the teletransmission manometer, and then adjustment drum pressure for drum pressure is stable at the setting value, makes drum pressure not receive the influence of outer net pressure fluctuation, has solved the problem of tedge waste heat recovery system pressure and temperature fluctuation, has eliminated the potential safety hazard, has created the condition for the longlife of tedge waste heat recovery system.

Description

Ascending pipe waste heat recovery pressure stabilizing system

Technical Field

The utility model relates to a riser waste heat recovery utilizes system, more specifically says, relates to a riser waste heat recovery steady voltage system.

Background

After steam generated by the recovery of waste heat of the ascending pipe is subjected to steam-liquid separation in the steam drum, a small amount of steam is removed for the use of the deaerator, and most of steam is directly merged into a low-pressure steam pipe network in a plant area. Because the low-pressure steam pipe network is directly connected with each steam user, the steam causes grid-connected steam pressure fluctuation due to the use and stop of the users in the use process of the steam, and directly causes the steam drum pressure to fluctuate along with a grid-connected system. The steam drum is a key device of the riser waste heat recycling system, and all pressure in the system is affected by the pressure of the steam drum, so that pressure fluctuation of the whole riser waste heat recycling system is caused.

Even more disadvantageous to the system is that, since the system produces saturated steam, the fluctuation of the steam pressure also causes temperature change, thereby causing the temperature and pressure of the whole system to be in a fluctuation condition. The riser heat exchanger is not only subjected to periodic changes in the temperature of the raw gas, but also to changes in the external pressure and temperature. Meanwhile, all pressure equipment, pumps, pipelines and valves including the pumps in the system are subjected to temperature and pressure changes all the time, and the leakage phenomenon of the pipelines or the valves is easy to occur. Meanwhile, due to fluctuation of pressure and temperature, liquid levels of a steam drum and a deaerator are difficult to stabilize, the tower head pressure and temperature of the deaerator are also difficult to control, the deaerating effect of the deaerator is influenced, and the whole service life of the system is seriously influenced.

Disclosure of Invention

1. Technical problem to be solved by the utility model

The utility model aims to overcome the defects and provide a waste heat recovery and pressure stabilization system of the ascending pipe, which adopts the technical proposal of the utility model, has simple structure and convenient connection, an electric control valve and a remote transmission pressure gauge are additionally arranged between the steam distributing cylinder and the steam pipe network, the remote transmission pressure gauge is electrically connected with the input end of a PID controller, the output end of the PID controller is electrically connected with the electric control valve, so that the electric control valve is controlled to work according to the comparison result of the steam pocket pressure value measured by the remote pressure gauge and the preset value in the PID controller, and then the pressure of the steam pocket is adjusted to be stabilized at a set value, so that the pressure of the steam pocket is not influenced by the pressure fluctuation of an external network, the problems of pressure and temperature fluctuation of the riser waste heat recycling system are solved, potential safety hazards are eliminated, and conditions are created for the service life of the riser waste heat recycling system.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a riser waste heat recovery and pressure stabilization system, which comprises an electric regulating valve, wherein the electric regulating valve is connected between a distributing cylinder and a steam pipe network in the riser waste heat recovery system, and a remote pressure gauge is arranged on a pipeline between the distributing cylinder in the riser waste heat recovery system and the electric regulating valve; the remote transmission pressure gauge is electrically connected with the input end of the PID controller, and the output end of the PID controller is electrically connected with the electric regulating valve.

Furthermore, a first stop valve is arranged at the inlet of the electric control valve, and a second stop valve is arranged at the outlet of the electric control valve; and a bypass pipeline is connected between the inlet of the first stop valve and the outlet of the second stop valve, and a third stop valve is installed on the bypass pipeline.

Furthermore, the ascending pipe waste heat recycling system comprises two groups of steam drums, and each group of steam drums forms a circulating loop with the ascending pipe heat exchanger through a forced circulating pump; the steam outlets of the two groups of steam drums are communicated with the steam inlet of the steam distributing cylinder; one path of steam outlet of the steam distributing cylinder is communicated with a steam pipe network; the other path of steam outlet of the steam distributing cylinder is communicated with a steam inlet of the deaerator; the water outlet of the deaerator is respectively communicated with the water replenishing ports of the two groups of steam drums through a water feeding pump; and a demineralized water inlet of the deaerator is communicated with the demineralized water tank through a demineralized water pump.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with existing well-known technique, have following beneficial effect:

(1) the utility model discloses a rising pipe waste heat recovery steady voltage system, it adds electric control valve between gas-distributing cylinder and steam pipe network, then the teletransmission manometer is connected with the input electricity of PID controller, the output of PID controller is connected with electric control valve electricity, preset a setting value in the PID controller, detect the steam pocket pressure value through the teletransmission manometer, and send the steam pocket pressure value that measures to the PID controller in with the setting value comparison, if the steam pocket pressure value that measures is less than the setting value, then control electric control valve work, make electric control valve feedback valve position close little, electric control valve resistance loss increases, lead to the steam pocket pressure to rise, finally reach the setting value, if the steam pocket pressure value that measures is higher than the setting value, then control electric control valve work, make electric control valve feedback valve position open greatly, electric control valve resistance loss reduces, lead to the steam pocket pressure decline, finally, a set value is reached, equipment and pipelines such as a riser heat exchanger, all running pumps, a steam pocket, a valve and the like in the system can run at stable temperature and pressure, the damage to the equipment is small, potential safety hazards are eliminated, conditions are created for the life of the riser waste heat recycling system, the deoxidizing effect can be improved, and the oxidative corrosion to the system is reduced;

(2) the utility model discloses a riser waste heat recovery steady voltage system, its electrical control valve's import department sets up first stop valve, and electrical control valve's exit is provided with the second stop valve, is connected with the bypass pipeline between the import of first stop valve and the export of second stop valve, installs the third stop valve on this bypass pipeline, simple structure, and convenient connection, it can to close the third stop valve simultaneously with the second stop valve to need to overhaul electrical control valve time, convenient to overhaul.

Drawings

Fig. 1 is the structural schematic diagram of a rising pipe waste heat recovery and pressure stabilizing system of the present invention.

The reference numerals in the schematic drawings illustrate: 1. an electric control valve; 2. a remote pressure gauge; 3. a first shut-off valve; 4. a second stop valve; 5. a third stop valve; 6. a cylinder is divided; 7. a bypass conduit; 8. a steam drum; 9. a forced circulation pump; 10. a riser heat exchanger; 11. a deaerator; 12. a feed pump; 13. a demineralized water pump; 14. a demineralized water tank.

Detailed Description

For a further understanding of the present invention, reference will be made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Examples

With reference to fig. 1, the ascending pipe waste heat recovery and pressure stabilization system of the present embodiment is applied to an ascending pipe waste heat recovery and utilization system, so that each device and pipeline, such as an ascending pipe heat exchanger, all operating pumps, a steam drum, a valve, and the like, in the system operate at a stable temperature and pressure, the damage to the device is small, the potential safety hazard is eliminated, conditions are created for the long service life of the ascending pipe waste heat recovery and utilization system, the oxygen removal effect is improved, and the oxidation corrosion to the system is reduced;

continuing to refer to fig. 1, the ascending pipe waste heat recovery and utilization system in the embodiment includes two sets of steam drums 8, and each set of steam drum 8 forms a circulation loop with the ascending pipe heat exchanger 10 through a forced circulation pump 9; the steam outlets of the two groups of steam drums 8 are communicated with the steam inlet of the steam distributing cylinder 6; one path of steam outlet of the steam distributing cylinder 6 is communicated with a steam pipe network; the other path of steam outlet of the steam distributing cylinder 6 is communicated with a steam inlet of the deaerator 11; the water outlet of the deaerator 11 is respectively communicated with the water replenishing ports of the two groups of steam drums 8 through a water feeding pump 12; the desalted water inlet of the deaerator 11 is communicated with a desalted water tank 14 through a desalted water pump 13;

continuing to fig. 1, the ascending tube waste heat recovery and pressure stabilization system of the present embodiment includes an electric control valve 1, the electric control valve 1 is connected between a steam distributing cylinder 6 and a steam pipe network in the ascending tube waste heat recovery and utilization system, and a remote pressure gauge 2 is arranged on a pipeline connecting the electric control valve 1 and the steam distributing cylinder 6 in the ascending tube waste heat recovery and utilization system; a remote transmission pressure gauge 2 is electrically connected with the input end of a PID controller, the output end of the PID controller is electrically connected with an electric control valve 1, an electric control valve is additionally arranged between a steam distribution cylinder and a steam pipe network, then the remote transmission pressure gauge is electrically connected with the input end of the PID controller, the output end of the PID controller is electrically connected with the electric control valve, a set value is preset in the PID controller, a steam pocket pressure value is detected through the remote transmission pressure gauge, the detected steam pocket pressure value is sent to the PID controller to be compared with the set value, if the detected steam pocket pressure value is lower than the set value, the electric control valve is controlled to work, the position of a feedback valve of the electric control valve is reduced, the resistance loss of the electric control valve is increased, the steam pocket pressure is increased, the set value is finally reached, if the detected steam pocket pressure value is higher than the set value, the electric control valve is controlled to work, and the position of the feedback valve of the electric control valve is increased, the valve resistance loss of the electric regulating valve is reduced, so that the pressure of a steam drum is reduced, and finally, a set value is reached;

continuing to fig. 1, a first stop valve 3 is arranged at the inlet of the electric control valve 1, and a second stop valve 4 is arranged at the outlet of the electric control valve 1; be connected with bypass pipeline 7 between the import of first stop valve 3 and the export of second stop valve 4, install third stop valve 5 on this bypass pipeline, simple structure, it is convenient to connect, it can to open the third stop valve simultaneously to close first stop valve and second stop valve when needing to overhaul electric control valve, easy to overhaul.

The utility model discloses a riser waste heat recovery steady voltage system, moreover, the steam generator is simple in structure, it is convenient to connect, add electrical control valve and teletransmission manometer between gas-distributing cylinder and steam pipe network, and the teletransmission manometer is connected with the input electricity of PID controller, the output and the electrical control valve electricity of PID controller, make the steam pocket pressure value that records according to the teletransmission manometer and the interior predetermined value comparison result of PID controller control electrical control valve work, and then adjustment steam pocket pressure, make steam pocket pressure stable at the setting value, make steam pocket pressure not receive the influence of outer net pressure fluctuation, the problem of riser waste heat recovery system pressure and temperature fluctuation has been solved, the potential safety hazard has been eliminated, long-lived condition has been created for riser waste heat recovery system.

The present invention and its embodiments have been described above schematically, and the description is not limited thereto, and what is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Therefore, if the person skilled in the art receives the teaching of the present invention, without departing from the inventive spirit of the present invention, the person skilled in the art should also design the similar structural modes and embodiments without creativity to the technical solution, and all shall fall within the protection scope of the present invention.

Claims

1. The utility model provides a riser waste heat recovery steady voltage system which characterized in that: the device comprises an electric regulating valve (1), wherein the electric regulating valve (1) is connected between a steam distributing cylinder (6) and a steam pipe network in a riser waste heat recycling system, and a remote transmission pressure gauge (2) is arranged on a pipeline which is connected between the electric regulating valve (1) and the steam distributing cylinder (6) in the riser waste heat recycling system; the remote-transmission pressure gauge (2) is electrically connected with the input end of the PID controller, and the output end of the PID controller is electrically connected with the electric regulating valve (1).

2. The riser waste heat recovery and pressure stabilization system of claim 1, wherein: a first stop valve (3) is arranged at the inlet of the electric regulating valve (1), and a second stop valve (4) is arranged at the outlet of the electric regulating valve (1); and a bypass pipeline (7) is connected between the inlet of the first stop valve (3) and the outlet of the second stop valve (4), and a third stop valve (5) is installed on the bypass pipeline.

3. The riser waste heat recovery and pressure stabilization system of claim 1, wherein: the ascending pipe waste heat recycling system comprises steam drums (8), two groups of steam drums (8) are arranged, and each group of steam drums (8) forms a circulating loop with an ascending pipe heat exchanger (10) through a forced circulating pump (9); the steam outlets of the two groups of steam drums (8) are communicated with the steam inlet of the steam distributing cylinder (6); one path of steam outlet of the steam distributing cylinder (6) is communicated with a steam pipe network; the other path of steam outlet of the steam distributing cylinder (6) is communicated with the steam inlet of the deaerator (11); the water outlet of the deaerator (11) is respectively communicated with the water replenishing ports of the two groups of steam drums (8) through a water feeding pump (12); and a demineralized water inlet of the deaerator (11) is communicated with the demineralized water tank (14) through a demineralized water pump (13).