CN216841834U

CN216841834U - Turbine anti-skip system

Info

Publication number: CN216841834U
Application number: CN202220513367.3U
Authority: CN
Inventors: 袁慧; 白桃梅; 尤涛; 李伟
Original assignee: Yanzhou Coal Minng Yulin Energy Chemical Co ltd
Current assignee: Yanzhou Coal Minng Yulin Energy Chemical Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-06-28
Anticipated expiration: 2032-03-09

Abstract

The utility model relates to the technical field of industrial equipment, in particular to turbine anti-skip system, including turbine, feed liquor pipeline, liquid outlet pipeline and the auxiliary line of opening, the feed liquor pipeline is connected with the input of turbine, the liquid outlet pipeline is connected with the output of turbine, preceding cutting valve, self-regulating valve and back cutting valve have been set gradually along its flow direction on the feed liquor pipeline, the auxiliary line of opening communicates with the feed liquor pipeline, and the input of the auxiliary line of opening is located between preceding cutting valve and the self-regulating valve, and the output of the auxiliary line of opening is located between upper self-regulating valve and the back cutting valve, has set gradually first shut-off valve and second shut-off valve along its flow direction on the auxiliary line of opening; increase and open the quick-witted auxiliary line, cut the valve before adjusting and cut the degree of opening of valve after and make and can let the turbine start slow rotation and reach safe rotational speed until the rotational speed is stable when starting the turbine, prevent that the turbine rotational speed from taking place to jump the car suddenly too high, guarantee equipment safety, avoid equipment to damage, improve work efficiency.

Description

Turbine anti-skip system

Technical Field

The utility model relates to an industrial equipment technical field, in particular to turbine anti-bouncing system.

Background

In low temperature methyl alcohol washes energy recuperation device, the turbine can utilize the methyl alcohol flow to generate electricity, in actual operation, high pressure methyl alcohol is when flowing to the turbine, the turbine needs slow start, make the slew velocity improve gradually, finally reach the stable electricity generation that realizes of rotational speed, but in the in-service use process, because the hysteresis quality that self-modulation valve control accuracy and control on the feed liquor pipeline adjusted will lead to being difficult to control when adjusting the flow of high pressure methyl alcohol and target in place, make the rotational speed of turbine unstable, also can make the rotational speed of turbine overspeed simultaneously, the turbine will take place the skip when the rotational speed is greater than 3035r/min usually, cause the damage to turbine mechanical seal, make the turbine can not normally use, cause economic loss.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a turbine anti-bouncing system solves in low temperature methyl alcohol washing energy recovery unit, the turbine problem of bouncing easily.

The technical problem solution of the utility model:

the utility model provides a turbine anti-skip system, includes turbine, liquid inlet pipeline and liquid outlet pipeline, its characterized in that still includes the auxiliary line of opening, the liquid inlet pipeline is connected with the input of turbine, the liquid outlet pipeline is connected with the output of turbine, cuts valve, self-modulation valve and back on the liquid inlet pipeline before having set gradually and cuts the valve, the back is cut the valve and is close to the turbine, open the auxiliary line and establish on the liquid inlet pipeline, open before the input of auxiliary line is located and cut between valve and the self-modulation valve, open the output of auxiliary line and be located self-modulation valve and cut after and between the valve, open and install first shut-off valve and second trip valve along its direction of setting on the auxiliary line.

Further limiting, the ratio of the pipe diameter of the liquid inlet pipeline to the pipe diameter of the auxiliary line of the starting machine is 1: 0.9-0.7

Further limiting, the turbine anti-jumping system further comprises a liquid inlet branch line, the liquid inlet branch line is arranged on the liquid inlet pipeline, the input end of the liquid inlet branch line is located at the front end of the front cutting valve, the output end of the liquid inlet straight line is located between the turbine and the rear cutting valve, and a third one-way valve is arranged on the liquid inlet branch line.

Further limit, be provided with first check valve on the liquid outlet pipe.

Further limiting, the turbine anti-bumping system further comprises a liquid outlet branch line, the liquid outlet branch line is arranged on the liquid outlet pipeline, the first one-way valve is located between the input end and the output end of the liquid outlet branch line, and a second one-way valve is arranged on the liquid outlet branch line.

The beneficial effects of the utility model reside in that:

1. only one auxiliary starting line is added in parallel in the original equipment pipeline during equipment maintenance, the original pipeline is not required to be modified and disassembled, the modification is simple, and the cost is low; make high-pressure methyl alcohol when promoting the turbine and begin to rotate through increasing the machine of opening the auxiliary line, bypass the size that self-regulating valve comes direct control high-pressure methyl alcohol flow through first trip valve and second trip valve, flow control advances accurately in time, avoids the turbine overspeed skip to improve equipment life, improve work efficiency.

2. The liquid inlet branch line and the liquid outlet branch line are added to ensure that the liquid inlet pipeline and/or the liquid outlet pipeline can carry out emergency work through the corresponding branch line when the liquid inlet pipeline and/or the liquid outlet pipeline break down during working, so that the effective operation of the turbine is ensured, the accidents are avoided, and meanwhile, the production efficiency can also be ensured.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

in the figure, 1-turbine; 2-a liquid inlet pipeline; 21-front cutting valve; 22-self-regulating valves; 23-a rear cutting valve; 3-a liquid outlet pipeline; 31-a first one-way valve; 4-starting the auxiliary line; 41-a first shut-off valve; 42-a second shut-off valve; 5-liquid inlet branch line; 51-a third one-way valve; 6-liquid outlet branch line; 61-second check valve.

Detailed Description

Referring to fig. 1, a turbine anti-skip system comprises a turbine 1, a liquid inlet pipeline 2, a liquid outlet pipeline 3, a starting auxiliary line 4, a liquid inlet branch line 5 and a liquid outlet branch line 6; the liquid inlet branch line 5 and the liquid outlet branch line 6 are switched to be used when the corresponding liquid inlet pipeline 2 and the corresponding liquid outlet pipeline 3 are in failure, and the turbine 1 is maintained to continue to operate.

The input end of the turbine 1 is connected with a liquid inlet pipeline 2, the output end of the turbine 1 is connected with a liquid outlet pipeline 3, the turbine 1 is used for inputting the converted electric energy into a power grid, high-pressure methanol flows into the liquid inlet pipeline 2, the high-pressure methanol is usually about 5.75MPa, the high-pressure methanol reaches 0.8MPa after power generation and pressure reduction of the turbine 1, internal pressure energy changes, the high-pressure methanol is converted into the electric energy through the turbine 1, and at the moment, the low-pressure methanol flows out from the output end of the turbine 1; the energy is converted into electric energy through the turbine 1, and finally, the low-pressure methanol is discharged through the liquid outlet pipeline 3, so that the aim of fully utilizing the energy is fulfilled.

A front cutting valve 21, a self-regulating valve 22 and a rear cutting valve 23 are sequentially arranged on the liquid inlet pipeline 2 along the flowing direction of the internal high-pressure methanol and are used for controlling the flowing speed of the internal high-pressure methanol; the auxiliary starting line 4 is communicated with the liquid inlet pipeline 2, the ratio of the inner diameter of the liquid inlet pipeline 2 to the inner diameter of the auxiliary starting line 4 is 1: 0.9-0.7, the pipe diameter is reduced, the flowing speed of high-pressure methanol can be controlled more accurately, the excessive flow speed is avoided, and the phenomenon that the turbine 1 does not jump is avoided, wherein the input end of the auxiliary starting line 4 is connected between the front cut valve 21 and the self-regulating valve 22, the output end of the auxiliary starting line 4 is connected between the self-regulating valve 22 and the rear cut valve 23, and the first cut valve 41 and the second cut valve 42 are sequentially arranged on the auxiliary starting line 4 along the flowing direction of the auxiliary starting line.

During operation, the turbine 1 is firstly started, the rear cut valve 23 is firstly opened to the maximum after the high-pressure methanol in the liquid inlet pipeline 2 reaches the starting liquid level, the self-regulating valve 22 is kept closed, the first cut valve 41 is opened, then the front cut valve 21 is opened 3/5, and then the second cut valve 42 is slowly opened, so that the high-pressure methanol reaches 90m³H, overcoming the defects of low precision and hysteresis when the self-regulating valve 22 is used for controlling, starting to flow high-pressure methanol into the turbine 1 to drive the turbine 1 to work and slowly rotate the turbine 1, and finally slowly opening the first cut-off valve 41 to increase the flow of the high-pressure methanol so as to increase the rotation speed of the turbine 1 to a safe rotation speed, wherein the safe rotation speed is usually 2980r/min, and then realizing the grid connection of the turbine 1 and following the grid connection of the turbine 1Two valves of the back starting auxiliary line 4 are kept unchanged, the opening degree of the front cutting valve 21 is slowly increased, the flow of high-pressure methanol is further increased, the rotating speed of the turbine 1 is further improved, the generated energy is increased, and the starting auxiliary line 4 is closed after the turbine 1 generates stable power, so that the turbine 1 works stably.

The liquid inlet branch pipe 5 is connected with the liquid inlet pipeline 2 in parallel, the inner diameter of the pipeline can be selected to be 300mm, a third one-way valve 51 is installed on the liquid inlet branch pipe 5, and the liquid inlet branch pipe 5 is mainly used for opening the third one-way valve 51 for emergency use when the front cut valve 21, the self-regulating valve 22 and the rear cut valve 23 on the liquid inlet pipeline 2 fail, so that the normal operation of the turbine 1 is maintained.

The liquid outlet pipeline 3 is provided with a first check valve 31, after the turbine 1 starts to operate, low-pressure methanol is discharged through the liquid outlet pipeline 3 and flows to the thermal regeneration tower, the low-pressure methanol is pressurized by a high-pressure pump after being subjected to desulfurization and decarburization and is sent to a high-pressure area to be continuously used for washing and converting gas, finally the low-pressure methanol enters the turbine 1 to achieve recycling of resources, the liquid outlet branch line 6 is connected to the liquid outlet pipeline 3 in parallel, the liquid outlet branch line 6 is provided with a second check valve 61, the liquid outlet branch line 6 can also discharge the low-pressure methanol in time by opening the second check valve 61 when the liquid outlet pipeline 3 fails, stable operation of the turbine 1 is ensured, and the second check valve 61 and the third check valve 51 are kept in a closed state when no failure occurs.

Claims

1. An anti-skip system of a turbine comprises the turbine (1), a liquid inlet pipeline (2) and a liquid outlet pipeline (3), it is characterized by also comprising a starting auxiliary line (4), wherein the liquid inlet pipeline (2) is connected with the input end of the turbine (1), the liquid outlet pipeline (3) is connected with the output end of the turbine (1), the liquid inlet pipeline (2) is sequentially provided with a front cutting valve (21), a self-regulating valve (22) and a rear cutting valve (23), cut valve (23) after be close to turbine (1), open quick-witted auxiliary line (4) and establish on inlet liquid pipeline (2), the input of opening quick-witted auxiliary line (4) is located before last and is cut between valve (21) and self-modulation valve (22), and the output of opening quick-witted auxiliary line (4) is located self-modulation valve (22) and after cut between valve (23), and it installs first shut-off valve (41) and second trip valve (42) along its direction of setting up on opening quick-off line (4).

2. The turbine anti-skip system according to claim 1, wherein a ratio of a pipe diameter of the liquid inlet pipe (2) to a pipe diameter of the secondary starter line (4) is 1: 0.9-0.7.

3. The turbine anti-skip system according to claim 2, wherein the turbine anti-skip system further comprises a liquid inlet branch line (5), the liquid inlet branch line (5) is arranged on the liquid inlet pipeline (2), the input end of the liquid inlet branch line (5) is located at the front end of the front cut valve (21), the output end of the liquid inlet branch line (5) is located between the turbine (1) and the rear cut valve (23), and the liquid inlet branch line (5) is provided with a third one-way valve (51).

4. Turbine anti-skip system according to claim 3, characterized in that said outlet pipe (3) is provided with a first non-return valve (31).

5. The turbine anti-tripping system of claim 4, further comprising a liquid outlet branch line (6), wherein the liquid outlet branch line (6) is arranged on the liquid outlet pipeline (3), the first check valve (31) is located between the input end and the output end of the liquid outlet branch line (6), and the liquid outlet branch line (6) is provided with a second check valve (61).